Crops like rice, vegetables and corn may yield up to four times higher productivity when grown in urban environment instead of rural areas, according to a recent study.

So far, it     1     (think) that 15-20 percent of the world’s food is cultivated in urban settings. However, a lot more data is needed     2     (figure) out whether expanding cities can support their own food needs. With urban living becoming increasingly common worldwide, researchers aimed to investigate     3     possibilities of urban agriculture as a way to improve the food supply.

    4     there is no clear winner in terms of the most suitable urban growing method for crop cultivation, the study finds that certain types of crops can be suited to specific urban growing methods. For example, hydroponic (水培的) environments prove more suitable for watery fruits and leafy greens. Crops like lettuces and broccoli may be     5     (natural) suited to being grown vertically.

The cost-effectiveness of urban farming is something     6     remains uncertain at this moment. The cost of running climate-controlled environment for growing food and the cost of employing any staff     7     (require) in urban farming are both factors to consider.

The development of urban agriculture could be     8     (benefit) in many different ways----from being better equipped to survive the next pandemic to     9     (reduce) the environmental cost of food production.

Further research could look at how easily certain urban farming     10     (technique) could be extended. While there are still lots of things to explore, we consider it a solid foundation to get from.

While there is growing consumer     1     (realize) of the environmental impact of fast fashion, can the same be said about fast furniture? The chairs and tables that fill many of our homes and everyday spaces are manufactured on a mass scale, and the cheaper items often end up     2     landfills.

According to the Environmental Protection Agency (EPA), in 2020 over 12 million tons of furniture     3     (throw) out in America and some into the forest illegally. Buying furniture can be     4     (incredible) expensive. Many of us switch over to cheaper, instant brands like IKEA,     5     manufacturers use materials harder to recycle, which is likely to damage the environment.

With growing calls for sustainability, many brands are announcing to change though it remains     6     (see) whether they will keep these promises. In     7     (it) current sustainability strategy, IKEA commits itself to using only recyclable materials in all its products in an effort to practice “circular” design and cut emissions to net-zero. The concept of circular design     8     (win) increasing concern up to now. In     9     circular system, furniture products would be designed to last longer and be fully recyclable, thus forming a     10    (close) loop (环).

Many young people wants     1     (become) great athletes. They exercise and lift weights in the gym. But the fact is that they don’t become stronger,     2     makes them unhappy.

Therefore, some of them are considering     3     (take) pills, which they think will help them become     4     (strong) than before. However, the truth is that these pills usually have some unintended side     5     (effect). Some of them may even affect     6     (they) liver or heart.     7     fact, some great athletes such as Griffith Joyner, died very young because they     8     (take) some pills.

For the above reasons, I suggest that young people be     9     (care) not to take pills.     10     best way to become stronger is going to a gym to work out.

Gather together a couple of good friends and take a leisurely walk through the streets—this is what many youngsters in China enjoy doing when they pay a visit     1     a new city. To them, Citywalk means “wandering around the city” on foot. Participants can follow a special urban route, exploring old     2     (building) or enjoying real local snacks.

The origins of Citywalk can be traced (追溯) back to London, England. Strictly speaking, this form of urban tourism     3     (be) not as casual and aimless as it may appear. In the beginning, Citywalk referred to tours where participants followed a     4     (plan) route under the guidance of tour conductors, exploring deep into the city’s history, culture, landscapes     5     other aspects. Gradually, the concept of Citywalk,     6     focuses on the quiet appreciation of urban lifestyle and cultural atmosphere, has gained popularity worldwide.

Up to now, the Citywalk trend     7     (spread) from first-tier cities like Beijing and Shanghai to second-tier and third-tier cities, encouraging more participants and event organizers to get involved. Some organizers invite folk culture researchers and enthusiasts (爱好者)     8     (act) as tour guides.

In short, Citywalk not only offers     9     way for young people to interact with a city but also provides them with a new social scene, where people wit the same interests and ideas can     10     (easy) make friends.

Whether you use Short Messaging Service (SMS) or an instant messaging app (即时通讯应用程序) on your smartphone, you’ll see some words that are hard     1    (understand) because of the chat slang (俚语) people use.

Chat slang is a specific kind of language     2     is used in the context of new technologies. Most instant message slang falls into two kinds: acronyms and contractions. These acronyms     3    (make) up of the first letter of several words such as IDK (I don’t know), OIC (Oh I see), BRB(Be right back), BFN (Bye for now), LOL (Laugh out loud), and ASAP (As soon as possible). Contractions cut unnecessary parts of words and may use     4    (number) to take the place of sounds while keeping the meaning clear. Take     5     look at these examples of contractions: Plz (Please), Thx (Thanks), Cya (See you), U (You), R (Are), L8r (Later), B4 (Before), 2morro (Tomorrow).

Instant messaging with this kind of language can save time and be great fun,     6     remember to use it     7    (proper) and try not to depend too much     8     it. If you have to keep     9     (explain) what you write to people, it might be     10    (fast) to use the full word!