问题补充：
The open-air celebration has been put off the bad weather.
A. in case of
B. in spite of
C. instead of
D. because of
答案：
A. in case of
B. in spite of
C. instead of
(答案→)D. because of
解析：
D。比较：in case of意为“万一”，in spite of意为“尽管”，instead of意为“取代”“而不是”，because of意为“因为”“由于”。句意为：户外庆祝会因天气不好而被推迟了。
