No chicken or duck ______ in the supermarket since the first case of H7N9 was reported dead

I don’t think teenagers should be allowed to smoke.– .

That pair of trousers ________ nice. Can I try ________ on

What do you think of “Where are we going ,dad”, Mum—Perfect! Though I have seen it once, I want to see it _____ time.

If you don’t buy insurance for your car，you may ______losing everything when it gets destroyed in an accident.