Unit1 when was it invented ?第一课时课课练一、根据句意及汉语提醒完毕句子。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 _____ (平常的) 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、将下列句子变为积极语态。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 di...