22、a．Come to the lab(实验室)at 9:00 am．Don't arrive late for Class．

b．You can't fight in the lab．

c．When you come into the lab，listen to the teacher carefully(认真地)．

d．After the experiment(实验)，you must put everything back，and wash your hands with soup． 

e．When you leave，you must turn off the lights，close the windows，and lock(锁上)the door．

根据以上内容，判断下列句子正(T)误(F)．

1．You must arrive at the lab at 8:30．

2．You can fight in the lab．

3．You must listen to your teacher carefully．

4．You can't use the soup to wash your hands．

5．You must turn off the lights when you leave．