Amazing     it is, an astronaut’s superior position is filled with potential danger.
#30521
A
when
B
if
C
unless
D
as
推荐题目
Being League members, ___ we ought to work hard at our lessons;___ we ought to take an active part in social activities.
#80369
A
on one hand…on other hand
B
on the one hand….on the other hand
C
on the one hand…on the other
D
B and C
______ you are supposed to do ______ you don't like a thing is ______ it. Don't complain.
#30517
A
That; what; change
B
When; that; to change
C
What; when; change
D
What; that; changing