Set the alarm for an earlier time. _______ be late again tomorrow!

A．Not be sure to             B．Don’t be sure to                                 

C．Be sure not to            D．Be sure don’t

（2010·吉林长白高三质量检测）22．Set the alarm for an earlier time. _______ be late again tomorrow!

A．Not be sure to  B．Don’t be sure to     

C．Be sure not to   D．Be sure don’t