1. The student (who / whom / x) was selected to join the space program is my brother’s friend

2. They showed me the place (when / which /x) the spaceship landed last week.

3. David introduced me to the woman (whom / whose / x) husband is working for NASA.

4. The astronomer (which / whose / x) you want to meet is going to present a paper at the conference next Friday.

5. The twenty-ninth of May is the day (that/which /x) our astronauts will be returning home.

6. The man with (who / whom/x) Mr. Khoa is talking has flown into space three times.

7. The satellite (where / that / x) was launched into space yesterday belongs to Viet Nam.

8. The space age began in 1957 (when / which/x) the Soviet Union launched Sputnik 1, the world’s first man-made satellite.

9. An astronaut is a person (who / that /x) travels in a spacecraft into outer space.

10. The book (who / where /x) I’m reading is about the history of space exploration.

Xin hay nhất

1. Who

2. x

3. Whose

4. x

5. x

6. Whom

7. That

8. When

9. That

10. x

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