---Look at the boy running on the playground. Is it David? ---It ______ be him. I saw him go to the teachers’ office just now.
—They started working on the show two months ago, didn’t they?—___________. A lot of work needed to be finished before the show.
In the future,cars won’t be ______,and it’ll be _____ to travel everywhere by plane.A,cheap, expensive B. expensive ,expensiveC. cheap , cheap D. expensive,cheap
What’s the matter ________ the kitchen fan.
_ may have a chance to be successful if he tries his best.
Time goes by so fast . We must never miss the chance to show love for our parents and make them _____ how much they mean to us .