*Give the correct form of the verb in bracket.
1. I would help him if he (ask) …………………me.
2. What would you do if you (see) …………………a snake?
3. What would he do if he (have) …………………a lot of money?
4. John would win more races if he (train) …………………harder.
5. How would your father react if you (leave) …………………school?
6. I would gladly tell you the answer if I (know) …………………myself.
7. I would be a millionaire if I (win) …………………the first lottery prize.
8. That student could get much higher marks if he (study) …………………harder.
9. The world would be a better place if there (be) …………………fewer road accidents.
10. Mr. Nam would be very happy to meet his old friends if they (come) …………………to see him.

*Complete the sentences with the words from the box.

1. Halley’s ………………………only appears every 75 years. 
2. The ………………………is bigger than we can imagine. 
3. I think it would be incredibly exciting to do a ………………………. 
4. We were asked to practice by scuba diving in a ………………………. 
5. The government uses ………………………surveillance to track terrorists. 
6. They are predicting a ………………………shower at the beginning of June. 
7. ………………………is a leading company in the growing industry of space tourism. 
8. We also have to experience ………………………, which is awesome but a little dizzying. 
9. My dream is to become an ………………………, so I registered for the next Virgin Galactic flight. 
10. To prepare for the space trip, I read lots of interesting ………………………books about stars and planets.

*Complete the sentences with the words from the box.

1. The feeling of ……………………in space is surreal. 
2. It becomes harder to breathe in very high ……………………. 
3. It takes a lot of ……………………to keep this rocket in great condition. 
4. There are 8 planets in our galaxy but many more in other……………………. 
5. ……………………are responsible for many discoveries in scientific history. 
6. When an airplane is in ……………………, passengers can feel weightless. 
7. It is believed that ……………………will become popular in the next 50 years.                                                                                                                  8. NASA has had many failed ……………………but they are hopeful that this mission will succeed.                                                                                         9. The International Space Station has developed many new ……………………in the last 10 years. 
10. My little brother wants to work for NASA when he grows up so he can help build …………………….

*Complete the sentences with the words from the box.

1. The feeling of ……………………in space is surreal. 
2. It becomes harder to breathe in very high ……………………. 
3. It takes a lot of ……………………to keep this rocket in great condition. 
4. There are 8 planets in our galaxy but many more in other……………………. 
5. ……………………are responsible for many discoveries in scientific history. 
6. When an airplane is in ……………………, passengers can feel weightless. 
7. It is believed that ……………………will become popular in the next 50 years. 
8. NASA has had many failed ……………………but they are hopeful that this mission will succeed. 
9. The International Space Station has developed many new ……………………in the last 10 years. 
10. My little brother wants to work for NASA when he grows up so he can help build …………………….

*Complete the sentences with the words from the box.

1. Halley’s ………………………only appears every 75 years. 
2. The ………………………is bigger than we can imagine. 
3. I think it would be incredibly exciting to do a ………………………. 
4. We were asked to practice by scuba diving in a ………………………. 
5. The government uses ………………………surveillance to track terrorists. 
6. They are predicting a ………………………shower at the beginning of June. 
7. ………………………is a leading company in the growing industry of space tourism. 
8. We also have to experience ………………………, which is awesome but a little dizzying. 
9. My dream is to become an ………………………, so I registered for the next Virgin Galactic flight. 
10. To prepare for the space trip, I read lots of interesting ………………………books about stars and planets.

*Complete the sentences with the words from the box.

1. The rockets will be ………………………at 10 am. 
2. Astronauts use ………………………toothpaste in space. 
3. Scientists think that Mars will be ………………………someday. 
4. The new space shuttle needs 15 astronauts to ………………………it. 
5. Please ………………………your helmet to your spacesuit before take-off. 
6. You must ………………………the mountain carefully so you don’t slip and fall. 
7. Do you think humans and aliens could live together ………………………? 
8. ………………………space travel may become a profitable business in the future. 
9. I’m trying to get the baby to ………………………his food but he keeps spitting it out. 
10. These ………………………vapors are causing quite a bit of fog in the mountains.

*Complete the sentences with the words from the box.

1. The feeling of ……………………in space is surreal. 
2. It becomes harder to breathe in very high ……………………. 
3. It takes a lot of ……………………to keep this rocket in great condition. 
4. There are 8 planets in our galaxy but many more in other……………………. 
5. ……………………are responsible for many discoveries in scientific history. 
6. When an airplane is in ……………………, passengers can feel weightless. 
7. It is believed that ……………………will become popular in the next 50 years. 
8. NASA has had many failed ……………………but they are hopeful that this mission will succeed. 
9. The International Space Station has developed many new ……………………in the last 10 years. 
10. My little brother wants to work for NASA when he grows up so he can help build …………………….

*Complete the sentences with the words from the box.

1. Halley’s ………………………only appears every 75 years. 
2. The ………………………is bigger than we can imagine. 
3. I think it would be incredibly exciting to do a ………………………. 
4. We were asked to practice by scuba diving in a ………………………. 
5. The government uses ………………………surveillance to track terrorists. 
6. They are predicting a ………………………shower at the beginning of June. 
7. ………………………is a leading company in the growing industry of space tourism. 
8. We also have to experience ………………………, which is awesome but a little dizzying. 
9. My dream is to become an ………………………, so I registered for the next Virgin Galactic flight. 
10. To prepare for the space trip, I read lots of interesting ………………………books about stars and planets.

*Rewrite the following sentences, beginning with the given words.
1. A car knocked him down.
He …………………………………………………………………………………………………………………………
2. It’s not difficult to make bread.
Bread ………………………………………………………………………………………………………………………
3. I have some exercises that I must do.
I ……………………………………………………………………………………………………………………………
4. She last wrote to me seven months ago.
She hasn’t ………………………………………………………………………………………………………………
5. “Why don’t you go with me?” he asked me.
He asked me why ………………………………………………………………………………………………………
6. I began living in Ho Chi Minh City when I was 8.
I have ……………………………………………………………………………………………………………………
7. He couldn’t find her house unless he had her address.
If ……………………………………………………………………………………………………………………………
8. He couldn’t come to the party because he had an exam. 
Since ………………………………………………………………………………………………………………………
9. In spite of the heat in the afternoon, we decided not to go for a swim.
Although …………………………………………………………………………………………………………………
10. My father managed a small business in the city but he doesn’t any more.
My father …………………………………………………………………………………………………………………

* Complete the sentences using the past perfect or past simple.
1. She (tell) ………………………me she (study) ………………………a lot before the exam.
2. The garden (be) ………………………dead because it (be) ………………………dry all summer.
3. After they (eat) ………………………the selfish, they (begin) ………………………to feel sick.
4. She (live) ………………………in London before she (go) ………………………to The United States.
5. The grass (be) ………………………yellow because it (not rain) ………………………all summer.
6. Julie (already / arrive) ………………………at the station when I (get) ………………………there.
7. We (be) ………………………late for the plane because we (forget) ………………………our passports.
8. Yesterday Nam (bring) ………………………Na the record she (forget) ………………………it in his car.