题目内容
9．With the rise of modern communication tools，handwritten letters ______ by emails．（ ）| A． | will replace | B． | have replaced | ||
| C． | are replaced | D． | are being replaced |
分析 随着现代通讯工具的增加，手写信正被电子邮件代替．
解答 答案：D
根据句意分析handwritten letters和replace是被动关系，而且这个动作是现在正在发生．用现在进行时的被动式，结构为be being done．选D．
点评 英语中的时态主要由动词的形式决定，因此在学习英语时态时，要注意分析动词形式及具体语境，想象在那个特定的时间动作所发生的背景，这个动作是经常性动作、一般性动作、进行性动作、完成性动作还是将要发生的动作．考查时态的时候别忘了语态问题．
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