Question

Doctor Smith has made another wonderful discovery, _______ great importance.

A．which I think is of	B．which I think it is of
C．which is I think	D．I think which is

Answer 1

A

試題分析：句意：斯密斯博士做出另外一個發(fā)現(xiàn)，這我認為是很重要的。這里使用了非限制性定語從句，修飾discovery，which在定語從句中做主語，I think是插入語，選A。