2. 专升本
  3. Mrs. White became a teacher in 1987. She______for thirty years by next summer.

Mrs. White became a teacher in 1987. She______for thirty years by next summer.

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问题 Mrs. White became a teacher in 1987. She______for thirty years by next summer.
选项 A、will teach
B、would have taught
C、has been teaching
D、will have been teaching
答案D
解析 句意：怀特夫人从1987年开始当老师。截止到明年夏天，她将已经教了30年书了。动词时态题。由时间状语by next summer及句意可知，本句应用将来完成进行时，表示过去发生的动作一直延续到将来某一时间，并有可能继续下去。
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