She was doing her homework her sister was watching TV．A.asB.whenC.as soon asD.wh
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She was doing her homework ________ her sister was watching TV．
A.as
B.when
C.as soon as
D.while
试题答案
B
She was doing her homework ________ her sister was watching TV．
A.as
B.when
C.as soon as
D.while
B