No one knew what        because of the thick fog.
#39880
A
he had happened
B
had happened to him
C
had he happened
D
has happened to him
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–– My father _________Shanghai with my grandparents.––Really? _______ will they come back?
#39670
A
has been to; How soon
B
has gone to; How soon
C
has been to; How long
D
has gone to; How long
—Do you know the Englishman?—Yes. I           him for two years.
#40490
A
get to know
B
have known
C
knew
D
got to know
We    Beijing next week.
#40174
A
are leaving for
B
leave to
C
to leave to
D
left to