UnitWhenwasitinvented4

1、Unit 9 When was it invented?1 invent inventor invention2 calculator calculate calculation3 be used for be used to do be used to sth used to do useful useless4 spoon5 adjustable adjust x to y adjustment6 heel high-heeled7 battery8 operate operator operation cooperate9 battery-operated10 slipper slip1

2、1 heat heater12 bulb13 light bulb14 microwave15 microwave oven16 crispy17 salty18 sour19 by mistake20 chef1 / 721 sprinkleby accident22 by mistake by chance by the way23 Beverage according24 according to sth/sb25 ancient262829303132legendlegendarybushfall intofall offfall downfall in love withfall b

3、ehindcatch up withremain+adj.noticeproduceproducerproduction33 pleasant pleased pleasure mixture34 mix x with y in this way35 on the way to x in one s way by the way36 pie37 flying fly flight38 bakery2 / 7bakerbake41 throw throw away42 taste43 lemon44 cookie45 abacus46 binoculars47 century48 rank49

4、active act action actor actress active activity50 indoors outdoors51 create creation creator creative creativity52 wooden wood woods53 knock knock at54 knock into55 dividedivide x into y division56 aim aim at57 basket3 / 758 metal59 hoop60 shoot61 below62 backboard63 guide guidance64 towards65 court

5、67 develop development developing developed popularity68 be popular with69 rise raise70 risen71 worldwide nationwide72 association associate x with y73 equipment equip x with yFrom the text1 the computer2 shoes with adjustable heels3 all day4 it would be better to do5 in the end=at last=finally6 for

6、 a long time7 not until8 drinking water9 decide to domake a decision11 college students12 add x to y13 prefer x to y4 / 7prefer doing to doingprefer to do rather than doprefer to dopreference18 travel around19 this much-loved and active sport20 take part inplay a part/role in take placetake interest

7、 in take pride in take after take care oftake a look attake a walktake a resttake a shower27 be famous for28 be famous as29 practice/enjoy/finish/mind/consider doingReview1 change2 exchange3 pair4 electric electricity5 helpful6 helpless7 island8 thin9 thick10 customer11 although12 discover coverbe c

8、overed with x13 favorite5 / 714 toy15 article16 special17 magazine18 festival19 dry20 wet21 humid22 including23 factory24 dangerous25 danger26 in danger27 at risk28 safe29 safety30 team31 hang32 hang out33 move34 event35 experience36 experienced foreign37 foreigner38 increase39 decrease40 healthy41 unhealthy42 health irregu