I think children will study at home on computers _______ twenty years.

A．for          B．in          C．a(chǎn)fter             D．on

Be quick. The plane__________ in two minutes.

A．leave        B．left        C．will leave        D．leaves

My mother has ________housework to do than you.

A．much less        B．much many         C．very little           D．fewer

Do you like playing ______ basketball or playing _______ piano?

A．the；the         B．/； /        C．/； the        D．the；/

The two women were ______pleased to see each other that they talked on and on happily in the room.

A．such         B．so         C．to         D．very

Mary _______ on the phone when her friend went into her room.

A．talked         B．was talking         C．talk             D．is talking

What about ________ more trees to keep the air clean.

A．to plant       B．plant       C．planting        D．planted

I have some_______ news for you, Tom can't come tomorrow.

A．disappointed       B．disappointing         C． interested         D．interesting

I'm happy to know you are well and in good_______.

A．health         B．healthy           C．body         D．unhealthy

What do I have to do ________ I want to be thinner.

A．until         B．since         C．while         D．if