单项选择题

Mrs. Li became a teacher in 1985. She ______ for twenty years by next summer.

A．will teach
B．would have taught
C．has been teaching
D．will have been teaching
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单项选择题
She took an umbrella with her this morning ______ she should be caught in the rain.
A．so that
B．in order that
C．in case
D．now that
单项选择题
She said that the building would be finished by October, ______ I doubt very much.
A．that
B．this
C．when
D．which
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