keep on 和There’s no doubt that… 高考频度：★★★ 难易程度：★★ 1.The doctor suggested that he shouldn’t _____ in bed for long. A. keep on lying B. keep lying C. keep to lie D. keep lie 【参考答案】B 【试题解析】句意：医生建议他不应该持续卧床太久。keep on doing sth. 表示反复发生的动作；在此句中表示的是状态的延续，故用keep doing sth.。 【归纳拓展】 keep on 继续 （1）用作不及物动词短语，在句中单独使用 （2）构成短语keep on doing sth. “继续做某事” ?Keep on until you come to a filling station.继续前进，直到加油站为止。 ?They kept on working although they were tired. 他们虽然很疲劳，但还是继续工作。 ?The heavy rain didn't keep them from watching the football match. 大雨没能阻止他们看足球赛。 2. There is no doubt _____ you are bound to have an accident if you drive so fast down the motorway. A. which B. whether C. that D. if 【参考答案】C 【试题解析】考查连词（固定句型）。There is no doubt that…是固定句型，意思是“毫无疑问……”，其中，that引导同位语从句。句意：如果你在高速公路上开得这么快，毫无疑问会出事故的。故选C。 【归纳拓展】 There is no doubt that...是固定句型，意思是“毫无疑问/肯定……”。 ?There is no doubt that they will come to help us. 毫无疑问他们会来帮助我们的。 ?There is no doubt that he is an honest man. 毫无疑问他是一个诚实的人。 3. I don’t doubt he took the first place in his class, but I doubt he will succeed in the end. A.if; that B.if; which C.whether; whether D.that; whether 【参考答案】D 【试题解析】考查动词doubt的用法。句意:我不怀疑他在班上取得了第一名,但我不确定的是最后他能 否成功。doubt与否定副词连用时,其后的宾语从句通常由that引导;doubt用于肯定句时,其后的宾语从句 通常由whether/if引导,故本题选D。 【归纳拓展】 （1）当doubt为名词时，在否定句或疑问句中，其后面接that引导的同位语从句；若用在肯定句中，后接whether引导的同位语从句，注意此时不可以用if替换whether。 （2）当其为动词时，若用在否定句或疑问句中，后面接that引导的宾语从句；若用在肯定句中，后接whether或if引导的宾语从句。 （3）in doubt怀疑，拿不定主意 no/without/beyond/out of doubt无疑地，必定，毫无疑问 1. The Pacific region will be one of the fastest growing areas in the world in the 21st century. _____ shouldn’t be any doubt about it now. A.It B.That C.This D.There 2. _____ in the world _____China is a great country with a long history and rich history. A.There is no doubt; if B.It is no doubt; that C.There is no doubt; that D.It is no doubt; whether 3. There is no doubt that it is around the family and the home _____all the greatest virtues of human society are created, strengthened, and maintained. A.that B.where C.which D.with 4. In Kenya’s vast Tsavo National Park, breeding herds of elephants are a common sight, the new babies hurrying to_____ their mothers. A. keep track of B. keep up with C. keep in touch with D. keep away from 5．Walking alone in the dark, the boy whistled to_____his courage. A. keep up B. hold up C. take up D. set up 1. D【解析】考查代词。句意为：太平洋地区将会是21世纪世界上增长最快的地区之一，现在这一点是不 应该有任何疑问的。此处为there be句型 ... ...
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