1 . Parents need to have good ________ (communicate) with their children.

2 . ________ (交流) skills can be improved through practice.

3 . Dolphins use sound to __________ with each other. (communication)

4 . The little boy has little ________ (communicate) with others. He is always quiet.

5 . We students should use English in daily ________ (communicate).

6 . I think the _________ (communicate) between friends is useful. It helps them to become friendlier.