问题补充:
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
答案:
A. I think it is
B. I think which is
C. which I think it is
(答案→)D. which I think is
解析:句意为:--专家给我们提出了另一条建议,这条建议我认为对我们的项目很有帮助。
定语从句中缺主语,可以排除A,C。插入语I think,紧跟在特殊疑问词后,且无时态和语态的变化,可排除B. 故D选项正确
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