Question

【题目】— How long ________ it since he left his school?

— He ________ for three years.

A.has been; has leftB.is; has been awayC.was; has left

Answer 1

【答案】B

【解析】

句意：——他离开学校多久了？——他离开三年了。

考查时态。since自从，引导的时间状语从句，主句用现在完成时，如果主句主语为it，则还可以用一般现在时，故C选项错误；for+一段时间，用现在完成时，而且动词时态必须为延续性动词，故选B。