Mrs. Green______in this school since she came here.

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问题 Mrs. Green______in this school since she came here.

选项 A、teaches
B、taught
C、has taught

答案C

解析 格林女士自从来到这里就一直在这所学校教书。本题考查动词时态。题中有since引导的时间状语从句,主句应为现在完成时。teaches为一般现在时;taught为一般过去时;has taught为现在完成时。故[C]项正确。当有“for+时间词”,或since引导的时间状语从句,或already,ever,never,just,yet等词出现时,多用现在完成时。
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