B．a great deal of

　　C．a great many of

　　D．a large number of

　　解析　句意：有许多英语单词来自于外来语。a large number of相当于a good/great many，意为“许多”，修饰可数名词复数。当A、C两项后接的名词前有限定词时，才需接介词of；B项修饰不可数名词。

　　答案　D

　　Ⅵ.完形填空

　　There are about fifteen hundred languages in the world. But only a few of them are very__1__. English is one of them. Many people__2__it, not only in England and the USA, but in other parts of the world. About 20 million speak it__3__their native language. It is difficult to say how many people are learning it as a__4__language. Many millions are__5__to do so.

　　Is it easy or difficult to learn English? Different people may have different__6__. Have you ever__7__such advertisements(广告) in the newspapers or magazines? “Learn English in six weeks, or your__8__back...“Of course, it never__9__quite like this.

　　The only language that seems easy to learn is the mother tongue.We should__10__that we all learned our own language well when we were__11__. If we could learn English in the same way, it would not seem so difficult.__12__what a small child does. He listens to what people say. He__13__what he hears. When he is using the language, taking in it，__14__all the time, just imagine how much__15__that he gets!

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