12/ Where do you (come) ………come…………….from in Finland? -I (come) ……come…….from Helsinki. But I (not live) …haven't lived……there since I was ten years old.

15/ The first Olympic games (take)…took…….. place in Greece in 776.

16/ People (start)…was started………. to use the computer about 50 years ago.

17/ What ‘s that noise? - The children (play)……are playing……… tug of war.

Rewrite:

15. Unless we protect the environment, we will destroy ourselves.If.. we don't protect the environment, we will destroy ourselves..............................

16. Unless she is more hard-working, she will get low marks.If....  she isn't more hard-working, she will get low marks..................................

17. Unless he listens to his parents, he will fail.If... he doesn't listen to his parents, he will fail..........

Put the words in the correct order to make a sentence:

10. your eyes/ swimming/ should/ when/ goggles/ you/ you/ go/ wear/to protect

-> You should wear goggles to protect your eyes when you go swimming.

12/ Where do you (come) ………come…………….from in Finland? -I (come) ……come…….from Helsinki. But I (not live) …haven't lived……there since I was ten years old.

15/ The first Olympic games (take)…took…….. place in Greece in 776.

16/ People (start)…started………. to use the computer about 50 years ago.

17/ What ‘s that noise? - The children (play)……are playing……… tug of war.

Rewrite:

15. If we don't protect the environment, we will destroy ourselves.

16. If she isn't more hard-working, she will get low marks.

17. If he doesn't listen to his parents, he will fail.

Put the words in the correct order to make a sentence:

10. You should wear goggles to protect your eyes when you go swimming.