16.【解析】选A。此处Before的意思是“还没……就……”, 符合题意。

　　17.【解析】选D。根据句中on his new bike可以判断, 空白处应填riding, 这里是现在分词作方式状语。

　　18.【解析】选C。followed是“紧随其后”的意思。

　　19.【解析】选B。根据常识及语境可以知道此空应填on。意思是婴儿用手和膝盖爬。

　　20. 【解析】选D。此处us指夫妇两人。

　　Ⅲ. 答案:

　　Yesterday morning, it was already 7: 30 that I got up. Thinking I would be late, I

　　when

　　got dressing quickly and left without breakfast. There were such many people at the

　　dressed

　　so

　　bus stop that it was hard to catch a bus. So I rush towards my school. Suddenly, I ran

　　rushed

　　across an old woman and she fell down. Without make an apology, I left him

　　into

　　making

　　her

　　and went on. Later, I heard the old woman was bad injured in the leg and she was

　　badly

　　sent to hospital. I felt it very sorry. And the following day I paid her ∧ visit.

　　a

　　Ⅳ.

　　【参考范文】

　　Online Shopping

　　Nowadays, shopping through the Internet has been becoming increasingly popular among senior school students and they prefer to buy almost everything they want online.

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