Mrs. White came back late the heavy rain yesterday afternoon.A. becauseB. because ofC. but

问题补充：

Mrs. White came back late the heavy rain yesterday afternoon.

A. because

B. because of

C. but

D. since

答案：

A. because

(答案→)B. because of

C. but

D. since

解析：because 一般作为连词，表示原因的，because of 相当于介词，后接名词，故选答案为B