學而不思則罔，思而不學則殆。學習語言不僅要涉及廣泛的相關知識，溫故而知新也尤為重要。多做練習，可以有效的查缺補漏，夯實基礎。

大學英語四級完形填空練習(2)

In a telephone survey of more than 2, 000 adults, 21% said they believed the sun revolved (旋轉)around the earth. An __1__ 7% did not know which revolved around__2__. I have no doubt that__3__all of these people were__4__in school that the earth revolves around the sun；__5__may even have written it __6__ at test. But they never__7__their incorrect mental models of planetary (行星的)__8__because their every day observations didn’t support __9__ their teachers told them: People see the sun moving __10__ the sky as morning turns to night，and the earth seems stationary (靜止的)__11__ that is happening.

Students can learn the right answers __12__ heart in class，and yet never combined them__13__their working models of the world. The objectively correct answer the professor accepts and the__14__personal understanding of the world can__15__side by side，each unaffected by the other.

Outside of class，the student continues to use the__16__model because it has always worked well__17__that circumstance. Unless professors address__18__errors in students’personal models of the world, students are not__19__to replace them with the __20__ one.

1. [A] excessive　　[B] extra　　　[C] additional　　[D] added
2. [A] what　　　　　[B] which　　　[C] that　　　　　[D] other
3. [A] virtually　　[B] remarkably　[C] ideally　　　[D] preferably
4. [A] learned　　　[B] suggested　[C] taught　　　　[D] advised
5. [A] those　　　　[B] these　　　[C] who　　　　　　[D] they
6. [A] on　　　　　　[B] with　　　[C] under　　　　　[D] for
7. [A] formed　　　　[B] altered　　[C] believed　　　[D] thought
8. [A] operation　　[B] position　　[C] motion　　　　[D] location
9. [A] how　　　　　[B] which　　　[C] that　　　　　[D] what
10.[A] around　　　　[B] across　　[C] on　　　　　　[D] above
11.[A] since　　　　[B] so　　　　　[C] while　　　　[D] for
12.[A] to　　　　　　[B] by　　　　[C] in　　　　　　[D] with
13.[A] with　　　　　[B] into　　　[C] to　　　　　　[D] along
14.[A] adult's　　　[B] teacher's　[C] scientist's　　[D] student's
15.[A] exist　　　　[B] occur　　　[C] survive　　　　[D] maintain
16.[A] private　　　[B] individual　[C] personal　　　[D] own
17.[A] in　　　　　　[B] with　　　[C] on　　　　　　[D] for
18.[A] general　　　[B] natural　　[C] similar　　　　[D] specific
19.[A] obliged　　　[B] likely　　　[C] probable　　　[D] partial
20.[A] perfect　　　[B] better　　　[C] reasonable　　[D] correct

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