______ there are living creatures in the outer space as those on Earth hasn’t been proved so far.
#13957
A
When
B
How
C
If
D
Whether
推荐题目
After the heavy mudslide happened in Sichuan, hundreds of newspaper reporters were sent to ____ the natural disaster.
#13651
A
describe
B
cover
C
witness
D
experience
The fact is that I earned my passage by working as an unpaid hand, which _______ my appearance.
#12258
A
accounts for
B
turns up
C
dresses up
D
cuts down
How do you think _________that he was an hour late on such a short journey?
#14173
A
it came about
B
did it come about
C
it was come about
D
was it come about
John intended to be a famous singer; ________， he has a long way to go now.
#11155
A
therefore
B
meanwhile
C
however
D
otherwise