题目内容：

阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空(每空不多于3个单词)。

Last weekend our 1.(math) teacher, Mr. Green, 2. us to Greentown on a school trip. We left home at 7：00 a．m. on Saturday morning. Mr. Green drove the school bus. The trip took two3.(hour)! Some of us were asleep on the way 4. we got up very early in the morning. We finally(最后) 5.(arrive) in Greentown at about 11：30 a．m.. Then it started to rain hard.

At lunchtime, one of the 6.(boy) fell into the river. Luckily, Mr. Green was very good at 7.. He heard the boy's shouts and ran out to save him.

Sunday afternoon was terrible, too. Two girls went to the center of the town and didn't tell Mr. Green. They got 8.(lose). A policeman brought them back to our hotel. Mr. Green was very angry.

We went back to our city 9. Sunday evening. We 10.(feel) cold, wet and tired. Never again.