Question

Supply the present perfect tense of the verbs in parentheses.
1. Meteors _______________________ (crash) against the surface of the moon.
2. The moon ______________________(be) a mystery since the beginning of civilization.
3. Scientist _______________________( try) to reproduce the formation of craters.
4. Men ______________________( send) many astronauts to the moon.
5. He _____________________( study) astronomy.
6. The kids ________________( break) the door of the garage.
7. We __________________( go) to the zoo many times.
8. Helen ___________________( write) a letter to her friend in Holland.
9. The children ________________( help) their mother lately.
10. You __________________( forget) to call Nancy.

Answer 1

1.crashed
2.been
3.tried
4.sended
5.studied
6.broken
7.gone
8.wrote
9.helped
10.forgot