Tom kept quiet about the accident lose his job.A. so not as toB. so as not toC. so as to

问题补充：

Tom kept quiet about the accident lose his job.

A. so not as to

B. so as not to

C. so as to not

D. not so as to

答案：

A. so not as to

(答案→)B. so as not to

C. so as to not

D. not so as to

解析：so as to 中的to 是不定式符号，不定式的否定形式是将not放在不定式符号之前。