The expert offered us another piece of advice , ___ of great help to our program

题干

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

上一题下一题 0.4难度单项选择更新时间:2013-02-20 07:44:04

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