Cho 3 bạn nhanh nhất. Hạn 15 giờ chiều ngày 31/12, ngoài giờ nó thì coi như ko cóEx.4. Give the correct form of verbs in the bracket:
1. If you ....................... (break) a mirror, you ....................... (have) seven years of bad luck.
2. If he (eat) .......................  all that, he will be ill.
3. If you ....................... (spill) salt over your left shoulder, you....................... (take) sickness
away.
4. If you ....................... (walk) under a ladder, something bad ....................... (happen) to
you.
5. What (happen) .......................  if my computer can not start?
6. If Peter (ask) ....................... me, I (help) ....................... him with all my ability.
7. If students (be) ....................... lazy, they (not pass) ....................... the exam.
8. If she (study) ....................... harder, she (get) ....................... better grades.
9. I (not go) .......................  to his house unless you go with me.
10. The ice (melt) ....................... if people (put) ....................... it under the sunlight.
11. I suggest (buy) ....................... some souvenirs for my friends.
12. Her mom (suggest) ....................... that she (pay) ....................... more attention to the question.
13. I prefer (watch) ....................... TV to (draw) ....................... pictures.
14. I would rather (read) ....................... novels than (play) ....................... video games.
15. We (not meet) ....................... each other for over 10 years.
 
Ex.5. Choose the correct answer:
1. What will happen if the air _____________?
A. was polluted         B. be polluted            C. is polluted               D. has polluted
2. You can’t get higher result _____________  .
A. if you work hard                                    B. if  you not working harder
C. if you work harder                                  D. if you will don’t work harder                      
3. If I ____________ a pole, I ____________ go fishing.
A. get/ would             B. got/ -                     C. get/ ‘ll                    D. am getting/ will
4. _____________  if you take the map with you.
A. You will get lost    B. You won’t get lost C. You get lost              D. You got lost
5. What will I do if no one _____________ me at the airport?
A. meet                     B. will meet               C. meets                       D. met
6. If the train is late, we_____________ to the office.
        A. walk                     B. will walk               C. would walk              D. walks
7. She _____________if she has time.
        A. calls                     B. would call             C. will call                   D. calling
8. What will we do if the taxi_____________?
        A. don’t come            B. didn’t come           C. doesn’t come           D.  had not come
9. If the class _____________full, we will find another one.
        A. are                        B. will be                   C. were                        D. is
10. Unless he _____________more, he won’t get much commission.
        A. sell                       B. sells                      C. sold                         D. selling
11. If you_____________ this one, I’ll bring you another.
        A. doesn’t like           B. will not like           C. don’t like                 D. didn’t like
12. If we _____________ water into 100*C, it _____________
        A. heated/ boil           B. heat/ boils              C. heat/ will boil        D. are heating/ boils
13. My sister ____________you the solution if you ask her.
A. would show           B.  shows                  C. will show                 D. showed
14. If you don’t feel well, you_____________ better take a rest.
A. are                        B. would                   C. had                          D. have
15. Trees won’t grow____________ there is enough water.
          A. if                       B. when                      C. unless                       D. as