The plane didn’t take off the heavy rainA. becauseB. because ofC. soD. on

问题补充：

The plane didn’t take off the heavy rain

A. because

B. because of

C. so

D. on

答案：

A. because

(答案→)B. because of

C. so

D. on

解析：飞机因为大雨没有起飞。Because后跟从句，the heavy rain是名词词组，所以用because of。