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1 These are the motives for doing it A reasons B excuses C answers D replies 2 The river widens considerably as it begins to turn west A extends B stretches C broadens D bends 3 Many economists have given in to the fatal lure of mathematics. A error B puzzle C attraction D contradiction 4 With immense relief I stopped running. A no B little C scarce D enormous 5 A great deal has been done to remedy the situation A maintain B improve C preserve D protect 参考答案 l A motive：动机。reason：理由。这两个词意思比较接近。There is no reason to doubt his word.没有理由不相信他的话。excuse：借口。answer和reply都有回答的意思。 2 C widen 和broaden都有拓宽的意思。extend：延伸;延长。The builders Extended the road for three more miles筑路人把道路延长了三英里。stretch：延伸。The forests stretch for hundreds of miles.森林绵延数百英里。bend：弯曲。 | 
