— What are you going to do this weekend?— I don’t know. I ______ visit a friend.

 — Are you going to Beijing by air?— It’s fast, but expensive. So I’m not sure. I _____ take a train. 

“Mary looks hot and dry.” “So _____ you if you had so high a fever.”

My mother is a great cook and we ________ never get enough of her cookies.

You’d better put on a heavy coat.Sometimes it________be very cold here at night.