—How much is _______ for a schoolbag? —Experts say students should carry_______ more than 10 or 15 percent of their body weight.
Yesterday our head teacher made such an speech that we all felt .
It’s cold here. We must have the fire day and night.
Miss Brown is having a lot of trouble with the washing machine, but she doesn’t know whom to for help.
—Madam, your clothes are ready now. —Thanks. And how much shall I for them?
—Do you think our teacher is ? —Yes, he always corrects our homework and prepares his lessons .