At the meeting the chairman requested that all the members______ this problem carefully.1.had studied2.study3.would study4.studied
问题描述：
At the meeting the chairman requested that all the members______ this problem carefully.
1.had studied
2.study
3.would study
4.studied
答
2.study
request that -------(should) do
答
跟suggest一样,省略了should,选2
答
选2 本应该是should study ,这里省略了。考试就是这样的，要转个弯
答
2,省略了should
答
2.request that.(should)do sth.固定用法,答案省略了should ,后面应用动词原型