题目内容
He failed the exam________ he was not hard-working, not________his bad luck.
A. because; because B. because of; because
C. because;because of D. because of;because of
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题目内容
He failed the exam________ he was not hard-working, not________his bad luck.
A. because; because B. because of; because
C. because;because of D. because of;because of