初三年级下册英语练习册答案人教版2017

Unit 9 when was it invented ?

　　Section A

　　一： 1. invented 2.invention 3.adjustable 4.heat 5.slippers 二： 1~5 CBCCC

　　三： 1. What, used for 2. Who , invented 3. is , cleaned 4.must be repaired 5. to see

　　Section B

　　一： 1.notice 2. salty 3.produced 4. remain 5.pleasant

　　二: 2.too thin 2.by accident 3.According to, was discovered 4. by mistake 5.in this way ,in the end 6.fell into

　　三: 1~5:AADCD 6~10:BDBDC 11~12 :AC

　　四: for, on, Who , think, are, inwentions, is , most

　　Self Check and Reading

　　一: 1.century 2.knock 3.below 4.wooden 5.towards 6. developing 7.divided 8.active 9.aim 10.create

　　二: 1.helpful 2.invention 3.salt 4.the most popular 5.safety 6.wood

　　三: 1.It is believed 2.named 3. to learn 4.was sent 5.was handed in 6.Was ,cleaned 7.found him 8.When was, invented

　　四: 1~5:BADBA 6~10:CADAB

　　五: 1~5:ABCAC

　　6.He grew vegetables in his garden and sold them.With the money he set up a chemical lab.

　　7.Yes.Because he was awarded 1368 separate and distinct patents during his lifetime.

　　8.February 11th,1847 9.October 18th ,1931 10.America 11.Built a lab 12. 1368

　　13. His first patented invention was an electrical vote recorder in 1868.

　　14. 1876~1877,invented the phonograph.

　　15.1900~1910, invented and perfected and steel alkaline storage battery.

　　Unit10 By the time I got outside ,the bus had already left

　　Section A

　　一： 1.lock 2.verslept 3.rush 4.relative 5.broke

　　二： 1. had left 2.had left 3.to come 4.had cooked 5.doesn’t rain 6.had had 7. finishing 8.had learnt

　　三: 1~5:CBBAB

　　四: 1.walking, on time 2.been late for ,came ,close 3.go off ,overslept 4.broke down 5.ran off

　　Section B

　　一 : 1.exhausted 2.costume 3.ending 4.thrilled 5.empty 6.reveal 7.panic 8.describe 9.fooled 10.married

　　二： 1~5CABBD 6~10BAACD

　　三: 1.set off 2.get married 3.invited ,to watch 4.showed up 5.as much ,as 6.stay up 7.happened to 8.Hundreds of 9.so ,that

　　四： 1~5:BEDCA

　　Self Check and Reading

　　一： 1.met,hadn’t seen 2.crying 3.to go 4.have learnt/learned 5.will be showed /shown

　　二: 1.too,to 2.as much as possible 3.had seen 4.has he 5.weren’t allowed

　　三: 1~5 CBCCD 6~10 BABDC

　　四: 1~5 TFFTF 6~10 CDBAC

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