Learning English will us a lot of time.

I think you can ______ money by yourself to buy a present for your mother.—OK. I’ll try. I’ll not let a penny waste.

Mrs. Brown isn’t here. She has to ______ her baby at home.

When the teacher came into the classroom, the students ____ in groups.

Do you know the activity called “________ Lights” ?—Oh,it’s an activity that reminds people of saving energy.