Mary didn't come to school yesterday.that was she was ill．A.whyB.becauseC.howD.b
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Mary didn't come to school yesterday，that was ________ she was ill．
A.why
B.because
C.how
D.because of
试题答案
B
Mary didn't come to school yesterday，that was ________ she was ill．
A.why
B.because
C.how
D.because of
B