Ex.1

1)     Ithink so

2)      My watch has broken (stopped)

3)      When did you do it?

4)      I don’t think so.

5)      …how it works.

Ex.2

1)      Took out 2) turned off 3) put in 4)turned on 5) turned it off 6) unplugged 7) turned it on 8) plugged it in

Ex.3

1)b,2) a 3) a 4) b 5) c