A bad eating habit will not kill people at once. It can, _______, cause many diseases.

A. though B. but C. however D. because

C 【解析】句意：不好的飲食習(xí)慣將不會(huì)馬上殺死人。然而，它能導(dǎo)致很多疾病。though盡管；but但是；however然而；because因?yàn)�。結(jié)合句意，前半句表示不好的飲食習(xí)慣無(wú)法殺死人，后半句表示它能導(dǎo)致很多疾病，前后表示轉(zhuǎn)折關(guān)系，此處有逗號(hào)隔開(kāi)，故用however，故選C。
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閱讀理解

(2014瀘州)

All living things on the earth need other living things to live．Nothing lives alone．Most animals must live in a group，and even a plant grows close together with others of the same kind．Sometimes one living thing kills another，or one eats and the other is eaten．One kind of life eats another kind of life in order to live，and together they form a food chain(食物鏈)．All food chains begin with the sun，and all food chain become broken up if one of them disappears．

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A．every life needs food

B．plants are very important

C．no living thing can live alone

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B．makes animals to grow fast

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d．sunlight e．things in the air

A．a(chǎn)；b；c；d

B．b；c；d；e

C．a(chǎn)；b；d；e

D．a(chǎn)；c；d；e

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B．Humans．

C．Plant－eating animals．

D．Meat－eating animals．

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