be laughed at by his mates he kept about quiet about punishment.A. So not as toB. So as

问题补充：

be laughed at by his mates, he kept about quiet about punishment.

A. So not as to

B. So as not to

C. In order not to

D. In order to not

答案：

A. So not as to

B. So as not to

(答案→)C. In order not to

D. In order to not

解析：考查不定式用法。So as to不能放在句首。不定式的否定式是在不定式前面直接加Not。故C正确。句意：为了不被同伴嘲笑，对于被惩罚的事情，他保持沉默。故C正确。