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题目
题型:不详难度:来源:
Computers are very useful in our lives, but they must        properly.
A. use                 B. be using                C. be used
答案
C
解析

试题分析:句意:电脑在我们的生活中非常有用,但是必须恰当地使用它们。结合语境可知下文主语是动作对象,故用被动语态,选C。
核心考点
试题【Computers are very useful in our lives, but they must        properly.A. use    】;主要考察你对动词的被动语态等知识点的理解。[详细]
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