Fifteen-minute test
Grade: 12 basic
Full name: ......................................... Class: 12....
Underline the correct alternative in the following sentences.
1. Hung studied very hard, but/so he still failed the exam.
2. Lan studied very hard, so/but she passed the exam very easily.
3. It was very cold last weekend, but/so, we still went for our picnic.
4. It was very cold last week, so/but we had to cancel our picnic.
5. He was an honest boy, but/so his parents still disbelieve in him.
6. He was an honest boy, but/so he was released from prison.
7. The flight attendant serves dinner, so/but I didn't eat.
8. The negative effect of cigarette smoking is enormous, but/so many people still I smoke.
9. Jane has caught a cold, so/but she needs to take a rest.
10. The issue has been all agreed upon, but/so we need to give it a second thought.
Fifteen-minute test
Grade: 12 basic
Full name: ......................................... Class: 12....
Fill each blank with but, so, however or therefore where appropriate.
1. This is the shortest way to the city center; ______ it is not the only way.
2. The boy was able to learn English, ______ he is very lazy.
3. He didn't attend the lesson, ______ he could not do his homework.
4. The rice is 5000 dong per kilo, ______ we bought 10 kilos.
5. Your son is heading to the right direction; ______ I think you should encourage him to learn harder.
6. It was midnight, ______ the restaurant was still open.
7. It was midnight, ______ they closed the restaurant and went home.
8. He had written to her many times, but she didn't give any reply, ______ they had been out of touch ever since.
9. We discussed the issue all day, ______ we could not come to a final conclusion.
10. It started to rain hard; ______ we decided to stay at home to watch TV.
Fifteen-minute test
Grade: 12 basic
Full name: ......................................... Class: 12....

a. but b. and c. so d. however
9. We live in the same building ________ we have hardly seen each other
a. and b. therefore c. but d. so
10. I went to buy a Rolling Stones CD ________ the shop didn't have it.
a. and b. but c. therefore d. so
Fifteen-minute test
Grade: 12 basic
Full name: ......................................... Class: 12....
Fill in each blank with the most suitable option:
1. This is an expensive ________ very useful book.
a. but b. so c. therefore d. however
2. I must say that you have done very well. ________, you should be aware that you still have a lot of thing to learn.
a. Therefore b. So c. But d. However
3. He is only sixteen, and ________, he is not eligible (đủ tư cá ch) to drive a car.
a. nevertheless b. but c. therefore d. however
4. Maria tried to read a novel in French ________ the book was too difficult for her to understand.
a. so that b. therefore c. but d. and
5. I bought a bottle of wine ________ we drank it together.
a. therefore b. so c. and d. but
6. The waiter was not very nice, ________, the food was delicious.
a. however b. but c. so d. and so
7. Anna needed some money, ________, she took a part-time job.
a. furthermore b. moreover c. however d. therefore
8. Julie has a guitar ________ she plays it really well.
a. and b. so c. but d. therefore
9. My fingers were injured, ________ my sister had to write the note for me.
a. and b. however c. so d. but
10. The concert was cancelled, ________ we went to a nightclub instead.
a. so b. however c. so on d. but
Fifteen-minute test Grade: 12 basic