◎ 题干
Fill in the blank with the right verb form. (用所给动词的正确形式填空。)
1. If he_________ (have) enough time tomorrow, he_________ (meet) you at his office.
2. When Ann called me, the barber_________ (cut) my hair.
3. If you _________ (help) others in trouble, you_________ (be) happy.
4. While he_________ (watch) a video at home, his best friend_________ (come) to see him yesterday
    afternoon.
5. What_________ (happen) if there is no water or air on the earth?
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Fill in the blank with the right verb form. (用所给动词的正确形式填空。) 1. If he_________ (have) enough time tomorrow, he_________ (meet) you at his office. …”主要考查了你对  【过去进行时】【状语从句】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。