2.　　　 The lab should be kept clean.

1.　　　 No eating, drinking or smoking is allowed in the chemistry lab.

21. We all know the i___________________ of learning English.

三 Reading

Rules for the Chemistry Lab

20.We have no money at p_________,. But I’m sure we can make much money in the future.

19. Mr Smith t__________ us math last year.

18.At last, he s___________ and became a great businessman.

17. He isn’t r__________ enough, and he always puts himself in his beautiful dreams.

16. As a student, we have to o__________ the school rules.

15. We are very s___________ in spring.

14. He thinks young people today show that they are cool with their p__________.