3. This is measured with a special      (仪器).

2. The temperature outside is very 1____________ . Please put on your coat.

1. Please don't forget to 1___________ your door when you go out.

20. A girl was heard to sing by Harry just now.(改为主动语态)
Harry      a girl      just now.

19. The website was set up in 2014.(对画线部分提问）
             the website       up?

18. The boss made the workers work 12 hours a day.(改为被动语态)

The workers ____________________________________________ 12 hours a day by the boss.

17. The calculator was invented after the computer.(改为同义句)
The computer was invented          the calculator.

16. My father bought the computer in 2010.(改为被动语态)

The computer                by my father in 2010.

(   ) 15. Its 9 o'clock now. I must go.

--Its raining outside. Don't leave      it stops.

A. when    B. since C. while    D. until

(   ) 14. The potato chips have been in the paper bag for half an hour. They are not      any more.

A. crispy    B. sweet C. salty    D. sour