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It is recommended that the project ________ not be started until all the preparations have been made.
A.mustB.canC.needD.should
D

试题分析:考察虚拟语气。动词recommend后面的宾语从句要使用虚拟语气should+动词原形;其中的should可以省略。句意:人们建议知道所有的准备都做好以后才开始这项计划。故D正确。
点评:英语中有4——四个表示“要求”的词,require, ask ,tell, demand;3——三个表示“建议”的词,suggest, recommend, advice;2——两个表示“命令”的词,order,command ; 1——一个表示“坚持”的词,insist。他们后面接 should+动词原形 的虚拟语气。Should可以省略。
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