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【题目】The choices people make can cause cancer. Not everyone who 1 (use) tobacco products will get cancer, but the chance of getting certain 2 (type) of cancer increases with tobacco use. The recent research 3 (show) us that the constant misuse or overuse of alcohol may cause cancer of the mouth and throat as well recently.

Sometimes cancer can be caused by radiation 4 (find) in sunlight and X-rays, in addition 5 other places. This doesn't mean you should stop getting X-rays or stay indoors, but limiting your 6 (expose) to radiation can reduce the chances of developing cancer. The X-rays you get at 7 doctor's or dentist's office are not 8 (typical) enough to cause cancer.

And sometimes, the reason 9 someone gets cancer is simply an unfortunate mystery. Some cells in the body may start to increase and change. Doctors and researchers can see it happening, 10 they cannot provide a description of why it started.

【答案】

1uses

2types

3has shown

4found

5to

6exposure

7the

8typically

9why

10but

【解析】本文是一篇说明文。文章主要介绍了癌症的成因。

1考查了主谓一致。本处who指代先行词everyone,从句的谓语动词应用单数形式;叙述一般的情况应用一般现在时,故本处用uses。句意:不是每个使用烟草产品的人都得癌症。故用uses。

2考查名词。certain前没有冠词,且type为可数名词,certain types of cancer意为某些种类的癌症。句意:但是吸烟会使某些癌症的发病率增加。故填types

3考查时态。主语researchshow之间是主谓关系,又由时间状语“recently”可知应用现在完成时,主语为单数。句意:最近的研究表明。故用has shown。

4考查非谓语动词。本处find与被修饰的名词之间为动宾关系,故用过去分词形式句意:有时癌症是由日光、X光以及别的地方发现的辐射引起的。故用found。

5考查短语固定搭配。in addition to“此外”。句意:除了其他地方故填to。

6考查名词。本处物主代词your后加名词形式。句意:限制你对辐射的接触(exposure)能够降低患癌症的可能性。故填exposure。

7考查冠词。the doctor's诊所,因此此处用定冠词the。句意:在医生或牙医的办公室故填the。

8考查副词。因为enough为形容词,故前面用副词修饰句意:通常不足以引起癌症故填typically。

9考查定语从句关系词。本处先行词为the reason,定语从句中缺原因状语,故用关系副词句意:有时,某人得癌症的原因确实是一个不幸的谜。故填why。

10考查连词。上下句之间可知为转折关系。句意:医生和研究人员能够看到细胞的扩散和变化,但是不能描述这为什么发生。故用but。

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