My sister was angry what he said.A. asB. becauseC. because ofD. since

问题补充：

My sister was angry what he said.

A. as

B. because

C. because of

D. since

答案：

A. as

B. because

(答案→)C. because of

D. since

解析：考查短语用法。ABD三项中的连词后面都要加完整的句子，C选项后面接名词或者短语.句意：因为他说的话，我的姐姐很生气。故C正确。