II) Write one word in each gap
1) Turn all the lights ....when you leave the room .We don't want to waste electricity !
2) ... my opinion , modern technology has improved all our lives
3) Could you disconnect your laptop ...the internet when you've finished checking your e-mail ?
4) We thought the experiment would work ,but...the end it didn't
5) ... last ,someone has built a battery-powered skateboard !
6) How many different types ...building can you think of?
7) That programme is about to start , so i'll turn ... the TV
8) Ice floats in water .Can you think of a reason ... that ?
1.off
2.In
3.to
4.in
5.At
6.of
7.on
8.about