下面共有15个句子，每个句子中均有1个词或短语画有底横线，请从每个句子后面所给的4个选项中选择1个与画线部分意义最相近的词或短语。请将答案涂在答题卡相应的位置上。

　　1 These are their motives for doing it

　　A  reasons

　　B  excuses

　　C answers

　　D plans

　　2 The river widens considerably as it begins to turn west

　　A twists

　　B  stretches

　　C  broadens

　　D  bends

　　3 Henry cannot resist the lure of drugs．

　　A abuse

　　B  flavor

　　C temptation

　　D  consumption

　　4 These programmes are of immense value to old people．

　　A  natural

　　B  fatal

　　C tiny D enormous

　　5 A great deal has been done to remedy．y the situation

　　A  maintain

　　B  improve

　　C  assess

　　D protect

　　6  John is collaborating with Mary in writing an article

　　A  cooperating

　　B  competing

　　C  combining

　　D  arguing

　　7 He is determined to consolidate his power

　　A  strengthen

　　B  control

　　C  abandon

　　D  exercise