May 22, 2021 was a sad day for the whole nation because Yuan Longping,     1     hybrid rice helped China feed more population with less than 9 percent of the world’s total land,     2     (pass) away at the age of 91.

In the past, it was difficult for Chinese people     3     (get) enough food. Yuan was determined to solve the problem. “China has a large population but     4     (limit) arable land(耕地),     5     the only way for us to make sure our national food supply is to increase crop yields,” he said.

Nearly half a century has gone by since Yuan Longping developed     6     first strain of hybrid rice     7     1973, and by the end of last year farmers in more than 40 countries had planted more than 7 million hectares of the crop.

Yuan Longping’s contribution has been     8     (wide) recognized.     9     (he) death is a great loss to China and the world, and he will always be remembered by the people all over the world. We should never forget Yuan Longping, a great scientist     10     (serve) the people heart and soul.

People are wasting things everywhere and every day. Wherever we go, we can see that paper, bottles and cans are thrown away; food     1     (waste) just because of its poor taste; clothes are thrown around simply due to their old fashion Not only things and money are wasted, but natural resources are wasted as well.     2     (tree) are cut down merely for fuel; wildlife is killed     3     (simple) for food; coal and minerals are exploited (开采) in     4     bad way.

The worst example of man’s waste is the waste of time. Many people tend to spend their time on     5     (worth) things, such as wandering about (漫步) in the street, gossiping in the office, or     6     (sleep) too much during the day. As we know, time is so valuable to us that it never returns if it     7     (pass) by.

It is time     8     (call) for an end to waste. On the one hand, we must save natural resources and make full use of them,     9     is very important to our future; otherwise human beings will be faced with the lack of natural resources and suffer     10     pollution caused by waste. On the other hand, we must value our time. Only with our time devoted to study and work for the people will we never regret the life we have had.