问题

tronaut did many experiments in the spaceship, ______much help for knowing space.

A:which we think it is
B:which we think are of
C:of which we think are
D:I think which is of

正确答案是：

同类题型

__ the teacher’s instruction, or hecould not have won the first prize in the English Speech Contest

We’ll go to climb the moutain this weekendWould you like to join us?— _____

下列句子中没有语病的一项是（）

g down, he thefootprints that hadn’t been blown away in the wind,concluding that they belonged to a wolf

… Will you go to the meeting for their discussion? … No, ______ invitedI don’t feel like getting involved in their business