Before traveling in space, you must know what it might feel like_____in an imaginary environment.
#98721
A
to travel
B
traveling
C
to be traveling
D
travel
推荐题目
It seems you need to apologize quickly ______ a good friend.
#95570
A
avoiding to lose
B
to avoid losing
C
avoiding losing
D
to avoid to lose
The boy lost his key, so he has no choice but till his mother came home．
#96492
A
waited
B
waiting
C
wait
D
to wait
---Where is George? He said he would meet me here at 3 o’clock.---He seems ________ with Mr. Brown in the office.
#91669
A
to talk
B
to have talked
C
to be talking
D
to be talked
We didn’t expect them ___ for us when we arrived there so late.
#97334
A
to be waiting
B
to have been waiting
C
to have waited
D
to wait