Now people can with their friends far away by e–mail, cellphone or letter.A. keep on B. keep in touch C. keep up
He used to _____ with her parents, but now she is used to ____ with her classmates at school.
Did Tom tell you _____________?
The two old men ______ each other since 1970.
---Your brother often disagrees with you, _______ he ? --- _______. We often have diifferent opinions.
____ of the students in our class is interested in skating.