用括号中所给单词的适当形式填空。
【小题1】You should be ________（friend）to these children.
【小题2】I can hear someone ________（laugh）in the other room.
【小题3】He said that he ________（come）back in five minutes.
【小题4】They didn’t play volleyball near the window. They were afraid ________（break）it.
【小题5】She left without ________（say）any word.