5 The date of the meeting must be changed again
II/
1 Don't forget to turn off the lights before you go to bed
2 She speaks so fast that I can't understand her
3 If I had lots of money,I'd take trips to space
4 He wasn't at class in the morning so maybe he was sick
5 Mother is always busy with the housework
6 Why do some people think life may be possible on Mars ?