Now people can with their friends far away by e–mail, cellphone or letter.A. keep on B. keep in touch C. keep up
— Alice, you ______ on the phone. — I’m coming. Thanks.
All of us ______ very happy if you can come with us.
— Hi, Nancy. Shall we go to France for the long holiday? — Sorry, Kate and I ______ there twice.
He ______ TV when I called him last night.
We are sure one day the air in Beijing will be much ______ than today.