He was busy writing a story, only ______ once in a while to smoke a cigarette.
#4946
A
to stop
B
stopping
C
to have stopped
D
having stopped
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It’s strange that she ____have failed to see her own shortcomings.
#4672
A
would
B
should
C
could
D
might
No one knows exactly when our ancestors started talking，but new evidence suggests _______might have happened a long time ago．
#4852
A
which
B
what
C
it
D
they
________ you understand the rule, you’ll find English easy to learn.
#4634
A
As
B
While
C
Once
D
Whether
I saw a woman running towards me in the dark. Before I could recognize who she was, she had run back in the direction ________ she had come.
#4957
A
of which
B
by which
C
in which
D
from which
— Have you called Mr. Johnson’s office? — Yes, he _____ back before tomorrow. So he can attend our meeting on time.
#4599
A
expected
B
is expected
C
is expecting
D
is to expect