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约950字。

　　Unit1 when was it invented ？
　　第一课时课课练
　　一、 根据句意及汉语提示完成句子。
　　1．Confucius(孔子) is a _______(先驱) in the field of education.
　　2．______ (工程) Hope has helped thousands of children in the last few years.
　　3．I want to buy a new handbag because my handbag is out of _____ (款式)．
　　 4．Which do you think is the most useful invention in our _____   (日常的) lives?
　　  5．Before going shopping, housewives usually   ______ (列清单)the things they have to buy.
　　Keys：1.pioneer  2.Project  3. Style  4.dail  5.list
　　二、 将下列句子改为被动语态。
　　1．The children sang an English song at the party.
　　An English song ——  ———— at the party by the children.
　　2．They planted many trees last year.
　　----------   ----------------  ----------- by them last year.
　　3．People use metal for making machines.
　　———— ——————  ——————  making machines by people.
　　4．Did they build a bridge here a year ago?
　　—————— a bridge ——————here by them a year ago?
　　Keys: 1.Was  sung   2.Many  trees   were   planted  3.Metal is  used  for
　　4. Was   built 
　　Unit1 when was it invented ？
　　第二课时课课练
　　一、 将下列句子变为被动语态。
　　1. A mouse ate half of the cake last night.
　　Half of the  cake_____ ____ by a mouse last night.
　　2. He chose six story books the other day.
　　Six story books _____ _______ by him the other day.
　　3. Uncle Lee gave Jac k a large cake for he painted the wall wonderfully.
　　Jack ______ _____ a large cake for he painted the wall wonderfully.
　　Keys：1.was eaten  2.were  chosen  3.was given
　　二、 将下列句子变为主动语态。
　　4. America was discovered by Columbus.
　　5. Were these machines invented by Edison?
　　_______ Edison _______ these machines? 
　　6. The post card was sent to Linda by Paul.
　　Paul _______ the post card _______ Linda.  
　　_______ Columbus discovered _________? 
　　Keys: 6. did  America  4.did  invent  5. Posted  to