Will you eat everything in your lunch box today? If not, will you save it for another time or just throw it away?

A recent study     1     (find) that 17% of all the food     2     (produce) around the world gets wasted each year,     3     reaches about 931 million tons. Believe it     4     not, 61% of the waste happens in our houses!

Food waste in homes     5     (happen) in rich countries like the US and the UK as well as in poor countries for different reasons.

Cultural habits could also lead to waste at home,       6     (include) massive packaging and “buy one, get one free” deals. ‘Use by’ or ‘best by’ dates       7     products could also cause people to throw away food. People could throw out food because they think it is     8     (safe) to eat, when in fact the date only shows when quality might go down.

Food was     9     (much) valued even in richer countries just a few generations ago, because people often couldn’t afford to waste it.     10     (throw) away food is for sure a great waste and we should try to make people know the importance of saving food.

In December 2018, a bunch of friends and I went to Europe to travel. Upon arrival in Vienna, we got the keys to the house from its owner. The     1     (decorate) of the house was quite good.

In Vienna, if anyone wants to copy a key, he or she is expected     2     (prove) their ownership of the property (房产) the key is for. It’s also really expensive. An ordinary key usually costs 150 euros (1.170 yuan). As the person in charge of the keys, I had a great responsibility.

    3     next day, we went everywhere, including the Sisi Museum and a coffee shop in the city center,     4     had dinner in a fancy restaurant. We felt quite relaxed. While we     5     (enjoy) dinner, my friends came up to me, asking for the keys so they could leave early. It was then that I realized that I’d lost them.

The host asked us to give him 300 euros to cover the cost of a new set of keys. We made a complaint about it but we had to pay the money. So, hoping to get our money back, we decided to do some detective work     6     our own.

I wrote an email to the Sisi Museum in the middle of the night, wondering whether the staff had found them. Early in the morning, I received their reply, saying that they had not.

    7     (fortunate) in the end, the keys were found in a souvenir shop. The host even said congratulations to us.

Though we saw many great     8     (sight) in Europe, the most     9     (value) thing about my trip was this lesson I learned: Never lose your keys in Vienna. Your keys ought to     10     (take) good care of.

A Long March-5 rocket,     1     (carry) the Chang’e-5 spacecraft, takes off from the Wenchang Spacecraft Launch Site on the coast of southern island province of Hainan on November 24,2020.

China’s Chang’e-5 probe( 探 测 器 ) decelerated and entered the lunar orbit on Saturday,     2    completed a vital step on its way to collect and return moon samples, the China National Space Administration (CNSA)     3    (announce).

After flying about 112 hours from Earth,     4     engine on the probe ignited (点火) when it was 400 km away from the surface     5     the moon at 8:58 p.m. and shut down after about 17 minutes, the CNSA said.

The probe performed the braking without incident and entered the lunar orbit     6    (successful ) according to the real-time monitoring data.

Chang’e-5 , which     7     (make) up of an orbiter, a lander, an ascender(上升器 ), and a returner, has carried out two orbital     8    (correction) during the Earth-Moon transfer, achieving its     9     (expect) goals.

Afterward, it will adjust the altitude and inclination (倾斜度) of its orbit around the moon. When the time is appropriate, it will land softly on the near side of the moon     10    (collect ) and return samples from the moon as planned.