单项选择题

Mrs. White became a teacher in 1985. She（）for twenty years by next summer.

A．will teach
B．will have taught
C．has been teaching
D．will have been taught

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单项选择题
I found the washing machine I had had（）broke down again.

A．it repairing
B．repaired
C．it repaired
D．to be repaired
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