Question

【題目】Not until they were introduced to each other ______ they had met at a dinner party.

A.they realizedB.had they realized

C.they had realizedD.did they realize

Answer 1

【答案】D

【解析】

考查倒裝。句意：直到他們互相介紹認(rèn)識(shí)之后，他們才意識(shí)到他們是在一次宴會(huì)上認(rèn)識(shí)的。not until結(jié)構(gòu)放在句首時(shí), 其后的主句用部分倒裝結(jié)構(gòu)。此空“意識(shí)到”的時(shí)間發(fā)生在“被互相介紹”之后, 根據(jù)were introduced可知此空應(yīng)用一般過去時(shí)。故選D。