◎ 题干
用括号内所给动词的适当形式填空。
1. After a knock at the door, the child heard his mother's voice _____ (call) him.
2. It's no good _____ (waste) strength in shouting.
3. Our group is mainly concerned with bird _____ (conserve) in coastal areas.
4. He felt embarrassed with so many eyes _____ (focus) on his clothes he was wearing.
5. The children talked so loudly at dinner table that I had to struggle _____ (hear).
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“用括号内所给动词的适当形式填空。 1. After a knock at the door, the child heard his mother's voice _____(call) him. 2. It's no good _____(waste) strength in …”主要考查了你对  【现在分词】【动名词】【不定式的被动式】【过去分词】  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。