完成句子,明确本课重点句型
1. 经常很难判定某些发明的发明者是谁。
______ ______ often ______ ______ decide on the inventor of certain inventions.
2. 这是因为有时候一些人发明的东西可能几乎一样。
______ ______ ______ sometimes a few people may invent things ______ ______ nearly the same.
3. 很难判断谁是第一个提出这种想法的人。
It's hard to tell who ______ ______ ______ the idea first.
4. 一些发明也可能导致其他发明的突然出现。
Some inventions can also ______ ______ other inventions ______ ______ ______ ______.

1. It is; difficult to 2. This is because; which are 3. came up with 4. lead to; all of a sudden

Ⅰ. 用方框中所给词的适当形式填空
believe sour remain mention doubt hero nearly profession
1. It is said that the twins are ______ who could never be beaten.
2. If you leave milk in the sun, it goes ______ quickly.
3. The naughty boy ______ fell into the river.
4. When to start the project wasn't ______ in Mr. Lee's speech.
5. Who will win the game ______ a secret.
6. Mr. Black is a ______ manager. He has much experience in business.
7. It is ______ that people's life will be getting better and better.
8. I ______ whether he was the owner of the bike.

1. heroes 2. sour 3. nearly 4. mentioned 5. remains 6. professional 7. believed 8. doubted/doubt

1. Edison was a great ______. He ______ over 1,000 ______ during his life.

A.invent; invented; inventions
B.inventor; invented; invention
C.inventor; invented; inventions
D.inventor; invents; inventions

C

2. The students in the class ______ several study groups.

A.divided into
B.is divided into
C.divide into
D.are divided into

D

3. (广东中考)—Would you please come to the dancing party with me tonight?
—______. I suppose we shall have a wonderful night!

A.Never mind
B.Have a good time
C.Not exactly
D.With pleasure

D