World No Smoking Day is ________ May 31.

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问题选择题

A. in B. on C. at

答案

答案：B

介词辨析。在表示时间时，in表示在一个时间范围；on表示在具体某一天；at表示在具体时刻。根据下文五月三十一日，可知选B。在具体一天前用介词on ，故选B

阅读理解

阅读短文，选择正确答案。

Everybody has a home. People have homes. Animals have homes. People live in many different kinds of

houses. Animals have different kinds of homes, too.

Some animals live in holes (洞) under the ground. The woodchuck (土拨鼠) lives under the ground. His

home has two doors. If any animals comes into one door, the woodchuck goes out through the other. Some

animals live in holes of the trees. Some squirrels build their nests (窝) high in trees. Most of the birds live in

nests of the trees. But hawks (鹰) build their nests high in the mountains.

1. The story is about . [ ]

A. some trees

B. some people

C. the homes of some animals

2. live under the ground.[ ]

A. All the animals

B. All the woodchucks

C. All the squirrels

3. How many doors are there in the woodchuck's house?[ ]

A. One.

B. Two.

C. Three.

4. People live in . [ ]

A. holes

B. trees

C. different kinds of houses

单项选择题 B型题

与幽门螺杆菌感染密切相关的是（）。

A.胰腺癌

B.肝癌

C.胃黏膜相关淋巴组织淋巴瘤

D.结肠癌

E.胃息肉