题目内容：

根据括号内所给的中文，写出单词的正确形式。

1.There is no ______________(交流) between us for a long time.

2.What a _____________(美妙的) time the children had last summer holiday!

3.Uncle Tom usually____________(放松) by playing chess after a hard day’s work.

4.After the teacher said, “Class is __________”(结束), all the boys ran out of the classroom.