Question

【題目】Mike has worked as an engineer _________he left his college.

A.sinceB.forC.beforeD.at

Answer 1

【答案】A

【解析】

句意：邁克自從大學(xué)畢業(yè)后一直當(dāng)工程師。

考查連詞。since自從……以來；for因?yàn)椋?/span>before之前；at在；根據(jù)“Mike has worked as an engineer _________he left his college.”可知主句是現(xiàn)在完成時(shí)，從句是一般過去時(shí)，可推測出此處是“自從……以來”，所以用“since”，故選A。