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单选题
The chairman requested that ______.
A

the members studied the problem more carefully

B

the problems were more carefully studied

C

the problems could be studied with more care

D

the members study the problem more carefully


参考答案

参考解析
解析:
suggest,request,order,demand,insist等表示建议、命令、要求、坚持的词后跟宾语从句要用虚拟语气,动词形式为 (should) do,故为D。
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