题目内容：

根据句意和汉语提示写出单词，完成句子。

1.Sally gets a lot of                (礼物) for her birthday.

2.The scientists have designed many             （实验）to test the ability of dogs to see colour

3.It’s said that the young man went abroad for further education alone in his             . (四十)

4.           (八月)is the hottest month of a year.

5.Please knock at the door before ___________ (进入) the room.