1．We all know that the light bulb was _________（发明）in 1879.
2．You’d better _________（加热）the juice before drinking it.
3．The factory _________（生产）100 watches every month.
4．Last summer we had a _________（令人愉快的）vacation in Dalian.
5．The computer is one of the most helpful _________ (invent).
6．I noticed Mary _________ (sweep) the floor when I passed by her room.
7．People especially children shouldn’t eat much _________ (salt) food.
8．In the earthquake-hit areas the government offered people _________ (drink) water.
9．We use the money to help disabled people. （改为被动语态）
The money _________ _________ _________ _________ disabled people _________ us.
10．After we had the meeting, we didn’t leave the USA. （改为同义句）
After _________the meeting, we _________ in the USA.
11．Tea wasn’t brought to the western world until 1610. （改为主动语态）
_________ _________ _________ the tea to the western world until 1610.
12．I think Jim is the most hard-working student in our class. （对划线部分提问）
_________ _________ you _________ _________ the most hard-working student in our class？
