— When did you finish your work?
—______________.
A. Until he came back B. Not until he came back.
C. Before he came back. D. Not after he came back.
—Did you go to Jack’s birthday party?
—No， I _______.
A. am not invited B. wasn’t invited
C. haven’t invited D. didn’t invite
—How long has your mother ______ Xinghua？
—About two weeks. But she will come back tomorrow.
A. been to B. been in C. gone to D. gone in
—You are late again. The class _________ for five minutes.
—Sorry. There’s something wrong with my bike.
A. began B. has begun C. was on D. has been on
— Must I return the book this week?
— No， you ______ . You can keep it for 20 days.
A. mustn’t B. needn’t C. can’t D. wouldn’t
— Mum， can I help you with the cleaning?
— Thank you， dear. But you are ______ now. You must wait till you are ______
A. too young; too old B. too young; enough old
C. so young; enough old D. too young; old enough
