36

49

56

25

why like it: Buttons had a long history, buttons were made by different materials.

1+1. ..∅... practicing English everyday of all ..the... students in our class is very necessary.

3+4. I told you aboutr ..the.. burglary that we had at ...a.. shop, didn't I?

5+6. While we were in ...∅... alaska, we saw ....∅.. Eskimo village.

7+8+9. Scientists sent ..an.. expedition to ..∅... the Mars during ....the.. 1990s.

10. We ate ..∅.. breakfast at eight o'clock this morning.