-Must I leave the reading room before 6o'clock?
-No, you _______. You can stay here until 6:30.( )
can't
needn't
mustn't
shouldn't
Is this hat_______________?
No, the red one is_________.( )
A.Lucy's; herB.Lucy; her
C.Lucy's; hersD.Lucy; hers
Please remember to _________the electricity and water before you leave the laboratory.( )
A.take offB.shut offC.go offD.put off
Li Lei didn't play computer games last weekend.__________,he worked as a volunteer in an old people's home. ( )
A.InsteadB.CertainlyC.ThoughD.Gradually
You'd better not hang out after school _______telling your parents. They may worry about you.( )
A.byB.withC.withoutD.after
What _________unusual school trip we had! I will never forget it.( )
A.aB.anC.theD./