Everyone in the class studied very hard since no one wanted to _____.A. fall down B fall off C. fall behind D. fall out
I don’t know when my son ________ back. When he_________ back, I’ll call you.
---Must I finish doing my homework now, Mum? ---No, you ________.
---_______ beautiful music it is!
He’s hardly late for school, ?
Some Math problems are difficult for the students work out.