2. They use computers to keep the traffic ________ (run) smoothly.

　　答案：running　句意：他们使用电脑来维持交通顺畅。考查"keep＋宾语＋宾补"结构，该结构中宾补可由形容词、副词、名词、分词等充当。在本题中，traffic与run之间是主动关系，故用现在分词形式。

　　3. Our English teacher found it very hard ________ (make) students read English aloud for an hour every day.

　　答案：to make　it用作形式宾语，故空格处用不定式作真正的宾语。

　　4. What a pity！Considering his ability and experience, he might ________ (do) better.

　　答案：have done　句意：真遗憾！考虑到他的能力和经验，他本可能做得更好。might have done表示过去的可能性，此处表示"本来可能做得更好"。

　　5. These clothes are ________ (suit) for a weekend in the country.

　　答案：suitable　"suitable"adj.合适的，空处用形容词形式作表语。

　　6. She doubted whether he would be equal ________ the job, so he was not admitted.

　　答案：to　"be equal to"能胜任，固定搭配。

　　7. The manager was satisfied to see many new products ________ (develop) after great effort.

　　答案：developed'句意：经理看到经过巨大努力许多新产品被研发出来非常满意。本题考查非谓语动词作宾补。many new products与develop之间是被动关系，所以要用过去分词。

　　8. This is not a match.We're playing chess just ________ fun.

　　答案：for　"for fun"为了玩乐，固定搭配。

　　9. We have made ________ clear that we are strongly against smoking in the office.

　　答案：it　it用作形式宾语。

　　10. At a rough estimate, Nigeria is three times the size ________ Great Britain.

　　答案：of　"倍数＋the＋名词＋of"是倍数的表达法之一。

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Ⅴ. 完形填空