Tom was about to close the window ______ his attention was caught by a bird.
#31898
A
when
B
if
C
and
D
till
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The villa gers have already known __________ we’ll do is to rebuild the bridge.
#31929
A
this
B
that
C
what
D
which
_____ the Internet brings much profit in, it can cause o lot of social problem.
#80454
A
If
B
While
C
Once
D
When
________ I can’t understand is ________ he wants to change his mind.
#32255
A
that; that
B
what; why
C
which; what
D
what; 不填
Much to my surprise, she _________ tears __________ she read the letter.
#30089
A
burst out; instant
B
burst into; the instant
C
burst out; instantly
D
burst into; instant