It is such a modem machine ____few of the workers know how to operate it.
#34226
A
which
B
that
C
as
D
the one
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Loulan city is not at all a traveler who has never seen the desert before can imagine.
#31645
A
that
B
what
C
which
D
where
How long do you think it will be ______ the Chinese people land on the moon?
#34769
A
that
B
since
C
until
D
before
Do you know he could have dealt with, if he had not passed the test?
#31565
A
how
B
what
C
where
D
why