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问题 选择题

They taught each other a sport _____________.[ ]

A. this afternoon

B. at this afternoon

答案

答案：A

选择题

最近，科学家制造出了一种新型氧分子--O4。下列有关叙述正确的是[ ]

A．O4是一种新型化合物

B．1个O4分子中含2个O2分子

C．O2和O4是由同种元素组成的两种单质

D．O2和O4的化学性质完全相同
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填空题

根据句意，用括号内所给单词的适当形式填空。

1. All the family are looking forward to the arrival of my father's _______(四十) birthday.

2. What an _________ (comfort) day! So hot and wet!

3. The people buried (被埋) under the ground waited for others' help _______ (hope) because they

    insisted that they would be saved sooner or later.

4. Mini-blog(微型博客)has become ________(fashion) of all the service on the Internet.

5. The workers are well-paid here in our company. Look! These cars are those _________(salesman)

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