Question

【题目】I think it's difficult the teacher for help.
A.don't ask
B.not ask
C.not to ask

Answer 1

【答案】C
【解析】句意：我认为不请老师帮忙这很难。根据句型It's +形容词+not to do sth“不做某事是……”，故此处为动词不定式not to ask，故选C。