When astronauts return to the earth’s atmosphere, helicopters fly to________they would land, ready to collect them.
#34720
A
what
B
where
C
which
D
that
推荐题目
______ some teenagers don’t realize is _______ difficult life can be after they get addicted to drugs．
#33803
A
What, how
B
That, how
C
What, what a
D
That, what
Mary rushed home_______ she heard the news, only______ that her husband was gone.
#80434
A
as soon as; finding
B
immediately; to find
C
the moment; find
D
when; found
---I’m afraid I have to give it up．---Don’t be discouraged．Remember _____ sticks to his work will succeed one day．
#32145
A
anyone
B
who
C
no matter who
D
whoever
----You seem to have known Dr Smith for a long time.---- That’s true. ______ he joined our club six years ago.
#32637
A
Since
B
Until
C
When
D
Before
You can get the best result ______you carry out the experiment under the desired conditions.
#31006
A
what if
B
even if
C
only if
D
as if