Ann is only two years old, so we should ______ her.

I’m ______ duty today. I must clean the classroom ______school. [ ]

Were you at home at 9 o’clock last night? —–Yes, I a shower at that time.

__________, she stood there without saying anything.

Ten years ago _______ only one building in our school. And in 10 years, _______ five buildings in our school.