Nobody can explain the mystery ____ he suddenly disappeared.
#70049
A
why
B
what
C
whether
D
which
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She won’t leave the TV set, ____ her husband is waiting for his supper.
#73105
A
as though
B
even though
C
whether
D
whenever
I can’t imagine why he didn’t stick to his promise____he would do his best to buy me a new bike.
#69598
A
which
B
that
C
what
D
as
One possibility is that tears get rid of certain chemicals from your body _____ build up during stress.
#66578
A
to which
B
that
C
where
D
in which
The writers, publishers and printers, they are, we never know, are making silent money.
#69946
A
who
B
whom
C
whatever
D
whenever
“Drive-ins” have large parking lots ______ customers are served in their cars by waitresses．
#69007
A
who
B
when
C
which
D
where