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 As ________ , they were waiting for us at the airport.
#72523
A
plan
B
planning
C
being planned
D
planned
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The work he devoted his time to _____ worth praising.
#72226
A
was
B
be
C
being
D
been
The letter is from my sister, ______is working in Beijing.
#73750
A
which
B
that
C
whom
D
who
As long as the laws of nature ______, there will be tornadoes.
#68427
A
exist
B
are existing
C
will exist
D
existed
There is not one of us          wishes to help you . We are doing our best .
#71688
A
who
B
that
C
as
D
but
Our teacher is always busy preparing lessons until 11 o’clock at night,        we students have gone to sleep.
#72594
A
that time
B
by which time
C
by that time
D
which time