题目内容：

根据句意和汉语注释，在答题卷标有题号的横线上写出单词的正确形式。

1.Eric wants to learn some English songs to welcome those ______________ (参观者) from England.

2.We can use a computer to search for a lot of important____________(信息) .

3.Most birds in the forest make beautiful __________(声音) and we can often feel good in the forest.

4.Tomorrow is his _______________ (九岁) birthday, he is excited.

5.There’s always a lot of _______________ (交通车辆) at this time of day.