完形填空 （15分）
If you meet Walker Smith, a 2-year-old boy from Coral Gables, Florida, the ___ thing he will ask you is what kind of car you drive. Walker has been interested in ___ for more than a year, ever _____ the day his father, a car fan, brought home a single matchbox car for him. “He started to ____ cars from his father, and within a week _____ two, he could name many cars on the road,” Walker’s mother Lynley Smith said.
Walker’s father often brings home magazines____ cars. Lynley said, “So Walker and his father would try to find cars _____in the magazines we and our friends drove. So they’d find a Saturn and my husband would say ‘This is the car______mommy drives !’ and then they’d look for Saab and say ‘This is daddy’s !’ Before we knew it, he pointed _____our kinds of cars out on the road.”
So now he knows every car you can ___,” said Lynley, “including some super fancy cars that you ____ see on the road,” such as Aston Martins and Lamborghinis. “We’re so ___ to have such a clever baby. Walker can now identify the cars he sees on the road though his ___ isn’t always right “He’s not _____ at ‘r’s, so for example when he sees a Porsche, he calls it a ‘Posh’. And when he sees a Ford, he’ll call it ‘fod’,” said Lynley. When you ask him what he wants to be when he ____, he will say “Of course a car businessman”. This must be his dream job.
| 小题1: | | A．last | B．next | C．first | D．coming |
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| 小题2: | | A．boxes | B．toys | C．cars | D．dolls |
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| 小题3: | | A．since | B．before | C．when | D．after |
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| 小题4: | | A．learn | B．buy | C．borrow | D．steal |
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| 小题7: | | A．excitedly | B．angrily | C．sadly | D．surprisingly |
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| 小题9: | | A．none | B．all | C．either | D．both |
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| 小题10: | | A．break | B．destroy | C．imagine | D．repair |
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| 小题11: | | A．never | B．always | C．also | D．ever |
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| 小题12: | | A．surprised | B．disappointed | C．bored | D．angry |
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| 小题13: | | A．spelling | B．pronunciation | C．imagination | D．explanation |
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| 小题14: | | A．strict | B．angry | C．good | D．careful |
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| 小题15: | | A．grows up | B．goes to college | C．gets married | D．has time |
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为—283kJ/mol，写出表示一氧化碳燃烧热的热化学方程式 
O2的反应可将化学能转化为电能，其工作原理如图所示，a极的电极反应式是 。