Much to my surprise she tears she read the letter.A. burst out; instantB. burst into;

问题补充：

Much to my surprise, she tears she read the letter.

A. burst out; instant

B. burst into; the instant

C. burst out; instantly

D. burst into; instant

答案：

A. burst out; instant

(答案→)B. burst into; the instant

C. burst out; instantly

D. burst into; instant

解析：考查连词。表达“突然大哭起来”用burst out crying或burst into tears。the instant为连词短语，表示“一……就……”句意：令我大为惊讶的是，她一读这封信就大哭起来。故B正确。