根据汉语意思完成句子，每空一词。
1.当心！车来了。
____ ____!The train is coming.
2.吉姆经常在上课时向窗外看。
Jim often____ ____ ____ the window when he is in class.
3.半夜，外面传来了奇怪的声音。
_____ ____ ____ the night, there was a strange sound.
4.在公园野餐后，我们应该捡起垃圾。
We should____ ____ ____ ____after we have a picnic in the park.
5.新年聚会结束了，让我们收拾教室吧。
The New Year's party is over. Let's____ ____the classroom.
6.女孩伸出一只手去摘那朵漂亮的花。
The girl____ _____ a hand for the beautiful flower.
7.昨天晚上他太伤心了以至于不能人睡。
Last night, he was too sad to____ _____.
