Choose the best answer in the brackets to complete the following sentences.
1. The student _______ was selected to join the space program is my brother’s friend.
2. They showed me the place _________ the spaceship landed last week.
3. David introduced me to the woman _________ husband is working for NASA.
4. The astronomer __________ you want to meet is going to present a paper at the conference next Friday.
5. The twenty-ninth of May is the day ___________ our astronauts will be returning home.
6. The man with _______ Mr. Khoa is talking has flown into space three times.
7. The satellite __________ was launched into space yesterday belongs to Viet Nam.
8. The space age began in 1957 ____________ the Soviet Union launched Sputnik 1, the world’s first man-made satellite.
9. An astronaut is a person _______ travels in a spacecraft into outer space.
10. The book _________ I’m reading is about the history of space exploration.
