Question

【题目】Amy ________ maths in our school since three years ago.

A. taughtB. teachesC. had taughtD. has taught

Answer 1

【答案】D

【解析】

句意：艾米从三年前就在我们学校教数学了。

考查时态。teach“教学”，taught过去式；teaches一般现在时，第三人称单数形式；had taught过去完成时；has taught现在完成时。根据since three years ago可知是过去对现在的影响，用现在完成时。故选D。