Question

【题目】Tom has been here ________one year, but his father has worked here ________ four years ago.

A.since; forB.since; sinceC.for; sinceD.for; /

Answer 1

【答案】C

【解析】

句意：Tom已经来这儿一年了，但是他的父亲四年前就在这儿工作。

考查介词辨析。since + 一段时间 + ago；for + 时间段。根据题意one year是时间段，前面应用for，而一段时间 + ago要用since。故选C。