题目内容：

根据所给汉语或首字母，用单词的适当形式填空

1.He was nervous at first but her warm welcome soon put him at e_________.

2.Our classroom is e_________ with a TV set and a computer.

3.I am too tired to _________（聚焦）my mind on solving this problem.

4.Tourism has brought considerable economic b_________ to the island.

5.There are v_________ kinds of after-class activities in our school.