III.Give correct verb form .

1. Her little brother (brush).....his teeth twice a day

2.There (be)..........a stadium and two police stations here three years ago

3.Tomorrow(be)................Sunday, so I (not go) ................to school

4. Remember(wash)...........the spinach carefully before (cook)....it

5.You had better( study)........... harder for your next exam

6. The teachers in his school make him ( study) ...........harder and better

7.The doctor advised him (stop) .................smoking if he wanted to live longer

8.He (live)................in this city since 1990

9.I(be)..............to England twice this year

10.if they arrive in time. we....................(go) to the cinema

Complete each sentence below, using the correct form of the verb in brackets.

1. I enjoy ( fish )... because it ( be )... relaxing.

2. Don't worry. I ( go )... swimming with you tomorrow.

3. My friends hate ( eat )... out. They think it ( cost )... a lot of meney.

4. My parents like ( live )... in the countryside. I think they ( move )... to our hometown next year.

5. We (go)... to the cinema twice a month. We all love (watch)... the ;atest films.

6. Do you think you (meet)... An this weekend? - I'm not sure.

Supply the correct VERB TENSE:

1.It is the first time I (meet) ...............him there.

2.It was at the age of 14 that Jack London (leave)...............school and (become)...........a sailor.

3.The video film was so interesting that I (see) .............. it twice

4.It was the first time they (ever meet)..........

5.The news (be)......quite alarming yesterday.

6.We (not live)...... in England for two years now.

7.I (never forget).......... what you (just tell)............ me.

8.They (prepare)............. the Christmas dinner at the moment.

9.When i last (stay)......in Cairo, I (ride)... to the Pyramids on a camel that my friends (borrow)................the day before.

10.Our teacher (tell)............... us yesterday that he (visit)..........England in 1970.

Gạch chân đáp án đúng.

1. These books are on the wrong shelf. They shouldn’t/mustn’t be here

2. There is plenty of time. We mustn’t/ don’t have to be at the cinema until 8.00.

3. Please put the paper cups and plates in the bin. We mustn’t/ don’t have to leave the room in a mess.

4. Thanks for coming. I’m glad you can/ could make it.

5. You look really tired. You should/ mighttake a few days off and have a holiday. 6. - ‘What am I going to do about a present for the hostess?’ - ‘You can/ have to bring her some flowers’

7. I don’t know what time III be home. I can/ have to be quite late, l’m afraid.

8. Before entering a Japanese house, you may/ should take off your shoes.

9. You mustn’t/ don’t have to conduct any chemistry experiments unless you are wearing safety glasses.

10. Should/ shall show you around to see the festival preparations?

Rewrite the sentence using the word in brackets.

1. It’s impolite of them to wear hats in the pagoda. (shouldn’t)

     ……………………………………………………………………………….

2. Children have to live with their parents until they reach the age of 18. (obliged)

     ……………………………………………………………………………….

3. Is it necessary for me to tip in a coffee shop? (have to)

     ……………………………………………………………………………….

4. It’s not mandatory for staff to wear vests in their company. (need)

     ……………………………………………………………………………….

5. It’s good for us to keep our traditional customs. (should)

     ……………………………………………………………………………….

6. It’s really important to remove your shoes when entering a temple. (must)

     ……………………………………………………………………………….

7. Photography is not allowed at some sacred places. (mustn’t)

     ……………………………………………………………………………….

8. It’s Saturday tomorrow, so it’s not necessary for Jane to get up early. (have to)

     ……………………………………………………………………………….

9. If I were you, I’d ask them about their customs. (should)

     ……………………………………………………………………………….

10. Why don’t we look for the information on the Internet? (how)

…………………………………………………………………………………..

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 13 to 50.

          Carbon dating can be used to estimate the age of any organic natural material; it has been used successfully in archeology to determine the age of ancient artifacts or fossils as well as in a variety of other fields. The principle underlying the use of carbon dating is that carbon is a part of all living things on Earth. Since a radioactive substance such as carbon-14 has a known half-life, the amount of carbon-14 remaining in an object can be used to date that object.
          Carbon-14 has a half-life of 5,570 years, which means that after that number of years, half of the carbon- 14 atoms have decayed into nitrogen-14. It is the ratio of carbon-14 in that substance that indicates the age of the substance. If, for example, in a particular sample the amount of carbon-14 is roughly equivalent to the amount of nitrogen-14, this indicates that around half of the carbon-14 has decayed into nitrogen-14, and the sample is approximately 5,570 years old.
          Carbon dating cannot be used effectively in dating objects that are older than 80,000 years. When objects are that old, much of the carbon-14 has already decayed into nitrogen-14, and the molecule amount that is left doesn’t provide a reliable measurement of age. In the case of older objects, other age-dating methods are available, methods which use radioactive atoms with longer half-lives than carbon has

This passage is mainly about______. 

A. archeology and the study of ancient artifacts

B. one method of dating old objects

C. various uses for carbon. 

D. the differences between carbon-14 and nitrogen-14