Question

【題目】Several weeks had gone by ________ I realized the painting was missing.

A.asB.sinceC.whenD.before

Answer 1

【答案】D

【解析】

考查連詞。句意：幾個(gè)星期過去了，我才意識(shí)到那幅畫不見了。A. as隨著……；B. since自從……；C. when當(dāng)……時(shí)候；D. before在……之前。此處表示在意識(shí)到之前已經(jīng)過去了幾個(gè)星期，要用before。故選D。