摘要：2．John fell asleep he was listening to the music． A after B before C when D as soon as
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John fell asleep ________ he was listening to the music．
[ ]
A．after
B．before
C．as soon as
D．while
John fell asleep ________ he was listening to the music．
[ ]
A．
after
B．
before
C．
while
D．
as soon as