问题补充：
The place was flooded it had been raining for several weeks.
A. because
B. because of
C. ever since
D. as a result of
答案：
(答案→)A. because
B. because of
C. ever since
D. as a result of
解析：短语辨析。 A. 因为，后面接从句 B.因为，后面接名词性短语 C. 从那时到现在D.因此；由于，后面接名词性短语。it had been raining for several weeks.为从句，结合句意可知选A。
