题目内容
I am sure ____ he did is wise.
| A.that | B.about that | C.of that | D.that what |
D
考查从句关系词的选择。根据句型可知此处that what he did is wise是宾语从句,从句中what he did 作is wise 的主语,在主语从句what he did 中缺少did的宾语,所以选择what
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