Your house is always so neat-how do you _____ it with three children? [ ]

Betty, pass me the ______. I will cut the cake.—OK, Mom. Here you are.

You are sure to fail the exam__________you study hard.

下列词语中加线字的注音有错误的一组是（ ）

Hu Jin had promised that she would meet Li Fang after work, but she didn’t _____.