Are you going to Beijing by ______ train?－No. I’m taking ______ car.

This shirt is too large for me. Can you show me ___ one?

If we ______ take environmental problems seriously, the earth _______ worse and worse.

If it ________ this Saturday, we will ________ for a picnic.

I was ______ tired ______ I fell asleep as soon as I lay down. —Oh, you need to have a good rest.