с тестами 1. You ... drink tap water. It's not safe.
A. Shouldn't
B. Can't
C. Don't have to
D. Mustn't
E. Couldn`t

2. I think people who live in apartments ... have dogs.
A. Mustn't
B. Should
C. Shouldn't
D. Couldn`t
E. Didn`t

3. My girlfriend's allergic to dairy products so, she ... eat anything made from milk.
A. Doesn't have to
B. Has to
C. Can't
D. Should
E. Could

4. You ... remember to finish the monthly report. The boss will be furious if you forget.
A. Should
B. Must
C. Shouldn't
D. Mustn't
E. Can

5. The Botero exhibition was free so, we ... pay anything.
A. Shouldn't to
B. Hadn't to
C. Didn't have to
D. Haven`t to
E. Could

6. Smoking is prohibited in public places.
A. You shouldn't smoke in public places.
B. You're not allowed to smoke in public places.
C. You don't have to smoke in public places.
D. You couldn`t smoke in public places.
E. You mustn`t smoke in public places.

7. Attending today's meeting is not mandatory.
A. You don't have to go to the meeting.
B. You shouldn't go to the meeting.
C. You have to go to the meeting.
D. You couldn`t go to the meeting.
E. You should go to the meeting.

8. Trucks are not allowed to go on this road.
A. Trucks shouldn't go on this road.
B. Trucks can't go on this road.
C. Trucks don't have to go on this road.
D. Trucks didn't have to go on this road.
E. Trucks couldn't go on this road.

9. It's not recommended to go swimming after having a big meal.
A. You don't have to go swimming after having a big meal.
B. You're not allowed to go swimming after having a big meal.
C. You shouldn't go swimming after having a big meal.
D. You mustn't go swimming after having a big meal.
E. You couldn't go swimming after having a big meal.

10. Tipping the waiter and the housekeeper is recommended but not mandatory in this resort.
A. You have to tip the waiter and the housekeeper.
B. You don't have to tip the waiter and the housekeeper.
C. You should tip the waiter and the housekeeper.
D. You mustn't tip the waiter and the housekeeper.
E. You didn't have to tip the waiter and the housekeeper.

Choose the correct tense, past simple or present perfect. These two tenses can be very confusing.
11. The teacher for half an hour.
A. Has explained
B. Explained
C. Is explaining
D. Have explained
E. Was explained

12. He in his project since May
A. Was worked
B. Have worked
C. Has worked
D. Worked
E. Has working
13. They friends since they were two.
A. Are
B. Were
C. Have been
D. Has been
E. Were being
14. She this computer program in 2005.
A. Has learnt
B. Learnt
C. Was learnt
D. Have learnt
E. Has learning
15. She History last year.
A. Has studied
B. Have studied
C. Was studied
D. Study
E. Studied
16. They Matias López chocolate more than twice a day.
A. Ate
B. Has eaten
C. Have eaten
D. Were eating
E. Were eaten
17. They horrified in their exam last September
A. Feel
B. Was feeling
C. Felt
D. Were felt
E. Have felt
18. It the Zaragoza Expo icon for one year.
A. Has been
B. Was
C. Have been
D. Were
E. Was being
19. We really Guy Fawkes night last year.
A. Have enjoyed
B. Has enjoyed
C. were enjoyed
D. Enjoyed
E. Was enjoyed
20. I comics since a was a little boy.
A.Read
B. Was reading
C. Reads
D. Have read
E. Was read