题目内容
The expert offered us another piece of advice,_____of great help to our program. ?
| A.I think it is? |
| B.I think which is? |
| C.which I think it is? |
| D.which I think is ? |
D
I think 为插入语,干扰了定语从句结构的判断,从句中缺少主语,不能省略。故选D。
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