is known to  us all is that America is a developed country         _________the First World.
#70093
A
Which; belonged
B
As; belonging to
C
What; belonging to
D
It; belonging
推荐题目
 _________ you may have, you should gather your courage to face the challenge.
#67618
A
Whatever serious a problem
B
However serious a problem
C
However a serious problem
D
No matter how a serious problem
While he     TV,a football flew into the room through the window.
#41227
A
watches
B
is watching
C
was watching
D
Watched