Vòng 2

 1 . I think you had better give up smoking immediately.

2 . We should be/ get there by 5.00, if there isn’t too much traffic.

3 . Do I have to bring my passport ?

4 . The cat must be in the house somewhere

 5. You don't  have to have / use an aerial with this radio

 6.  It's very convenient if you are unable to drive

7. John can't be  the thief                

 8 .Norman is bound to be late

 9 .All students are to report to the main hall at 9:00

10 .You ought to know better !

I)

1. A 

2.B

3.C

4.D

5.A

6.C

7 .B 

8.C

9.C

10.B

11.B

12.A

13.D

14.A

15.B

16.D

17. D

18.B

19.B

20.D