After Yang Liwei succeeded in circling the earth, ______ our astronauts desire to do is walk in space.

A. it

B. that

C. what

D. which

A. that you talked

B. you talked about it

C. which you talked with

D. you talked about

A. because

B. whether

C. because if

D. that

A. does the watch cost

B. did the watch cost

C. the watch costed

D. the watch cost

A. know who is he

B. know who he is

C. knows who is he

D. knows who he is

A. why

B. what

C. that

D. which

A. seems

B. were

C. are

D. is

A. as

B. when

C. until

D. before

A. was

B. were

C. has been

D. had been

A. be repair

B. to mend

C. to be repaired

D. being mend