Chemical pesticides and artificial fertilisers have been     1     widespread use in farming since the middle of the 20th century. When they were first introduced, many farmers welcomed them as a great way to fight crop disease and increase     2     (produce). Overtime, however, what some scientists have found is     3     their long-term use can sometimes harm both the land and people’s health.

As an alternative, some farmers     4     (switch) to organic farming, and many customers have turned to organic food when they shop at the local grocery. Organic farming is simply farming    5     using any chemicals.

Some people would prefer     6     (stop) the use of man-made chemicals in agriculture     7     (entire). What keeps them from doing so is the fact that chemical farming serves the high demand for food around the world. Organic farming is nowhere near able     8     (meet) that need. Therefore, there is still a long way to find a     9     (suit) solution that puts sufficient food on the dinner table while     10     (keep) people and the environment as healthy as possible.

There is a reason why we dream. Dreams aren’t just a product    1    our brain develops while we sleep. There is something more to it than that. It’s from dreams that some of the greatest inventions of man have become a     2    (real).

There     3    (be )a very simple exercise to start recalling your dreams. Before    4    (go) to bed, for at least 24 days, keep telling yourself, "I will remember all my dreams."    5    first, you may not see any results at all, but just insist. After a while you will     6     (probable) notice that vague(模糊的)memories of your dreams will stay in    7     (you)mind when you wake up. As you continue to do this, you will notice that it's not just one dream that comes back to you     8    a number of dreams.

Now the fun doesn't just stop there. Try to understand what your dreams mean, and see if it applies to something that is happening in your everyday life Many of the    9    (problem)we struggle with have already been solved in our    10    (amaze) mind. These answers come to us in the form of dreams.

Last Friday, the Danish Mayfly    1     (name) by an international group of scientists as the Insect of the Year for 2021. But it won't have a long time to celebrate because a fully developed mayfly only     2     (have) a few days to fly and lay new eggs before it dies.

    3    mayflies' time on earth is short, their developmental cycle is quite long. Female mayflies fly over water between May and September, laying     4     (thousand) of eggs that then go down to the riverbeds. They are buried(埋) there and it takes them between one to three years     5    (become) baby mayflies.

By     6     (reduce) its weight, a baby mayfly rises to the water surface. Once there, its skin breaks and within a few seconds a flyable mayfly is    7    (final) born. With neither mouth     8     stomach, the newly born mayfly can live only for a few days to lay new eggs before its     9    (die).

Scientists have carefully chosen    10     unique kind of insect each year since 1999 to bring the wildlife closer to people.

Chrysanthemum（菊花） comes from China and was recorded in some Chinese books as early as the 5th century BC. The flower     1    (introduce) to Japan during the Tang Dynasty. I usually begins to bloom（开花） in the 9th lunar month, lending a festive atmosphere （气氛） to Double Ninth Day. That's why the month is also regarded     2    "the month of chrysanthemum".

The flower has been favored by     3    (poet) through the ages, because it is one of the only flowers that bloom in late autumn. DuFu, a great Tang Dynasty poet, wrote more than ten poems singing the praises of the flower.

Chinese people     4     (be) fond of enjoying chrysanthemum on Double Ninth Day long ago. Chrysanthemum displays were usually held immediately after     5     day in some regions of China in the Qing Dynasty. People in Beijing began to stick chrysanthemums on doors and windows     6     (get) rid of the bad luck and bring in the good ones,     7     was a change of the custom of     8     (wear) chrysanthemum on people's heads. At these displays family members accompany     9     (they) elders to have a relaxing day in a     10     (nature) atmosphere while wishing for good health and happiness for them. The displays are often lively with a sea of visitors.