The biggest problem for most plants,which_______just get up and run away when threatened,is that animals like to eat them.

Mary would rather_______ inside_______ while I would rather she________ to go shopping with her friends.

Yang Liwei was a student at this flight school from 1983 to 1987, he studied very hard and was made chairman of the Students’ Union.

What a nice day! We decide ______ out for a picnic.

Do you mind coming to see me tomorrow -_______. I’d like to talk with you.