单项选择题

He made another wonderful discovery, ______ of great importance to science.

A. which I think is



B. which I think it is
C. which I think it


D. I think which is
<上一题 目录 下一题>
热门 试题

单项选择题
Without electricity, human life （）quite different today.

A. is
B. will be
C. would have been
D. would be
单项选择题
His son became a teacher,（） he wanted to be.

A. which
B. what
C. who
D. that
相关试题