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3. A. stayed    B. came C. dropped     D. fell

2. A. wonder B. understand        C. reply D. believe

1. A. tell        B. answer      C. give   D. realize

25、It won't hurt to take an umbrella with you.帶把傘去總沒有壞處。

24、help oneself to 擅自帶走；自用

23、explain sth. to sb. 向某人解釋某事

22、introduce sb. to sth. 把某事介紹給某人

21、in this respect（way）

20、share many experience＝have many experience in common