C. They don’t have any maps. There aren’t any clothes in the box.

(5) 注意下面句子中am, are, is, be的使用。你能找出点规律吗?

A. I am a maths teacher.

B. He is a fireman.

C. They are postmen.

D. I want to be a cleaner.

(6) 读下面的词组，你知道如何用英语表达“双/对”吗?

a pair of shoes two pairs of shoes

a pair of socks three pairs of socks

(7) 读下面的词组，总结表示“在什么时候”什么时候用at, 什么时候用on, 什么时又不用这些介词。

   at seven o’clock at five ten at nine thirty at eleven fifty