Having checked the doors were closed and ______ all the lights were off, the boy opened the door to his bedroom.
#31421
A
why
B
that
C
when
D
where
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Well, you can buy $20 tickets or 30 $ tickets, ______ you prefer．
#79736
A
which
B
whichever
C
whatever
D
what
— Why are you staring at me? — You look stupid! The way you wear is _____ annoys me most.
#33342
A
which
B
where
C
how
D
what
A dozen ideas were considered _______ the chief architect decided on the design of the building.
#32775
A
before
B
whether
C
unless
D
because