问题

The time is drawing near_____food raised in space will directly benefit humans below.
A:where
B:when
C:whether
D:why
B:when
C:whether
D:why
正确答案是:
同类题型
There are nine______ students at Green High School. Five _____ of them walk to school.
________ is difficult if you put your heart into it.
There a lot of farmland here. But now you can only see tall buildings.
The girl refused your offer last time. ___________ you don’t want to talk to her.
. I ____ walking in the garden ____ watching TV in the room.