问题补充：
Many visitors will have to wait for another two hours the heave rain.
A. instead of
B. because of
C. in case of
D. in spite of
答案：
A. instead of
(答案→)B. because of
C. in case of
D. in spite of
解析：介词短语辨析。A代替，而不是；B因为；C以防；D不管，尽管；句意：因为暴雨，很多的游客不得不又等了一个小时。根据句意说明B正确。
