We’d better have a ___________ discussion if we go to a ___________ place for the class trip.

Now old people without children ________ good care of by our government.—How happy they are!

It was in the lab_____ was taken charge of by Mr.Harris_____ they did the experiment.[ ]

What should I wear for the party?—It’s an informal one; it doesn’t matter ____ you’re dressed.

I’vegot to go now. —Must you I youcould stay for dinner with us.