[新知导引]
判断下列教材中句子的结构
1．All of us laughed.________________
2．I couldn't concentrate on the experiment.________________
3．The class was difficult.________________
4．Everyone laughed so much.________________
5．We had our chemistry class in the science lab.________________
6．He even told us a funny story.________________
7．I found most of my classmates and teachers friendly and helpful.________________
8．There's a lot to explore at senior high.________________
