题目内容
He had to retire(退休) early ______ poor health.
A.as a result | B.because |
C.so | D.because of |
D
连词考查。Because与because of都表示原因,但because必须引导句子,而because of后跟名词。
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题目内容
A.as a result | B.because |
C.so | D.because of |