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Be sure __________ when you have time.

A.
of coming
B.
about coming
C.
to come
D.
coming

C
解析：
be sure of／about sth. 對(duì)……確信／有把握；
be sure to do sth.表示一種期望、要求，意思為“務(wù)必……”“一定……”。

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科目：高中英語(yǔ) 來(lái)源： 題型：閱讀理解

Scientists have learned a lot about the kinds of food people need. They say that there are several kinds of food that people should eat every day. They are: green and yellow vegetables of all kinds; citrus （柑橘）fruits and tomatoes; potatoes and other fruits and vegetables ; meat of all kinds, fish and eggs; milk and foods made from milk; bread or cereal (谷物), rice is also in this kind of foods; butter or something like butter.

There are two problems, then, in feeding the large number of people on earth. The first thing is to find some ways to feed the world’s population so that no one is hungry. The second is to make sure that people everywhere have the right kind of food to make them grow to be strong and healthy.

31. According to the scientists, which of the following groups of food is the healthiest for your lunch?

A. chicken, apples, cereal , cabbages.

B. potatoes, carrots, rice, bread.

C. oranges, bananas, fish, tomatoes

D. beef, pork, fish , milk

32. It is important for people to eat __________.

A. three times a day

B. dinner at twelve o’clock

C. cooked food all the day

D. something from each of the seven kinds of food every day.

33. People in different countries and different places of the world________________.

A. have the right kinds of food to eat

B. cook their food in the same way

C. have their meals at the same time

D. eat food in different ways.

34. Which of the following is NOT true?

A. People in some places don’t have enough to eat.

B. There are too many people in the world.

C. One of the problems is that no one is hungry.

D. The scientists are trying to make people grow to be strong and healthy.

35. If there is paragraph 4, wh at do you think is going to be talked about?

A. When people eat their lunch.

B. What to do with the two problems.

C. How to cook food in different ways.

D. Why people eat different kinds of food.

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Be sure __________ when you have time.