As she was singing she suddenly which gave us a big surprise .A. broke downB. broke outC.

问题补充：

As she was singing,she suddenly ,which gave us a big surprise .

A. broke down

B. broke out

C. took down

D. got down

答案：

(答案→)A. broke down

B. broke out

C. took down

D. got down

解析：break down=lose control of one’s feelings =cry