It's too late.You'd better ( ) any more. A.not to sing B.not go on singing

It's too late.You'd better ( ) any more. A.not to sing B.not go on singing
It's too late.You'd better ( ) any more. A.not to sing B.not go on singing

It's too late.You'd better ( ) any more. A.not to sing B.not go on singing
B
had better not do sth 最好别做某事

had batter 后面接动词的原型 所以选择B

B had better (not) do sth