Milk quickly goes bad in summer        it is in a fridge(冰箱).
#57061
A
if
B
because
C
unless
D
when
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Don’t get off the bus _____ it has stopped.
#57377
A
after
B
when
C
if
D
until
---Did you hear the rain? ---______ .
#55536
A
Until 30 minutes
B
Until 30 minutes later
C
Not until 30 minutes
D
Not until 30 minutes later