Question

A.mark  B. checked  C. population   D. destroyed  E. chemicals

    In Tanzania, an African country, a company called APOPO trains African pouched rats(非洲有袋鼠）to find landmines(地雷）left over from the wars. The rats are trained to smell out some of the_1.__  in them. More importantly, these rats are too light to set off the landmines.

    Generally speaking, after 8 to 12 months of training, the rats can find landmines so that they can be safely destroyed. Rats and trainers search one small area at a time. To be sure that every inch of the ground is _2._, APOPO workers use a harness-and-rope system that guides the rats back and forth in rows. The trainer stands safely on the edge(边缘) of the area.

    When a rat smells landmines, it will dig the dirt in that spot(地点). The trainers __3._ each spot on a map. Later, people set off the landmines safely.

    In the African country of Mozambique, nearly half of the ___4.__ are younger than 15 years old. A lot of kids are in danger as they play and work. With the help of the rats and trainers, there will be no threat any more.

Answer

1.E

2.B

3.A

4.C

【解析】

试题分析：短文大意：在坦桑尼亚，一个非洲国家，一家名为APOPO的公司在训练非洲囊鼠寻找战争留下的地雷。

1.句子的意思为“这些老鼠被训练成闻出地雷中的……味”，而且在定冠词the后面肯定跟一个名词。根据所提供的两个名词，本题答案为chemicals(化学药品)。

2.句子的意思为“确保每一寸土地……”，可能填“形容词”或“被动语态”，根据前句意思“老鼠和工作人员搜寻更小的区域”，所以本题答案为checkecd(被检查)。

3.句子的意思为“当老鼠闻出地雷后，挖出。然后工作人员对于这个地点在地图上进行……”，根据意思应该填一个动词，根据前句和后句的时态，应为“一般现在时”，所以本题答案为mark(标记)。

4.句子的意思为“将近一般的……都小于15岁”，根据意思肯定填一个名词，那么就是“一般的人(口)”，所以本题答案为population(人口)。

考点：选词填空。