We believe _______ we could finally go to a good senior high school.
—May I use your dictionary? Mine is at home. —______.
—Do you know ______?—Yes. She is doing her homework.
Waste paper _______ everywhere. It’s our duty to keep the school clean.
My pen pal said he would write to me, but I _____ any letters from him so far.
—Lin Kai, hand in your homework, please. —Oh, sorry. I ______ it at home this morning.