Напиши недостающие буквы. b_sc_its, _o_e, _a_t_

1.i see the plane in the sky.

2. a lot of factories polute our atmosphere.

3. sun is the biggest star in our galaxy.

4. people went to the moon in the 20th century.

1. c2. b

3. c

4. d

5. a или b

6. b

7. a

8. c

9. a

10. d

11. a

12. d

13. b