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用所给单词的正确形式填空,并指出其正确词性

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用所给单词的正确形式填空,并指出其正确词性
1.If you can________these difficult questions,write down your_______on this answer sheet.answer)
2.What_____the big fire last night?Do you know the_____of the fire?(cause)
3.He is busy____the sitting room.We'd better keep the room______.(clean)
4.Look!She is using a new_____to______her new trousers.(iron)
5.Painting your bedroom blue is good for your______.I think you will_____well in a blue bedroom.(sleep)
6.It's not wise to wear____clothes in summer because the colour_____absorbs heat form the sun more easily than other colours.(black)
7.The shop_____at 9.00every morning.It has been___for two years.(open)
8.Though it takes a lot of___to prepare for the coming sports competition,Mr Wu is____enough to do it well.(energy)
9.We all think this maths problem is____enough for every student to work it out____.(easy)
10.You'd better____your bedroom every day because we need to breathe fresh______all the time.(air)
1,answer ( 动词0 answer(s)(名词)
2 caused (动词) cause(名词)
3 cleaning (动名词) clean(形容词)
4 iron(名词) iron (动词)
5 sleeping (名词) sleep (动词)
6 black(adj) balcken(v)
7 opens(v) open(adj) 万万不能用opened 过去分词,这里不是被动
8 energy (n) energtic(adj)
9 EASY (ADJ) easily(adv)
10air(v) air(n)