[单选题]He had to quit the job _____ his ill health.

A
because
B
as
C
because of
D
as for
正确答案:C
题目解析
考查词义辨析。句意:因为身体状况不好,他不得不辞去这份工作。because与as都能表示原因,但后面必须引导的是句子。as for至于,不能用来表示原因。故选C。
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