训练2 体裁：说明文 主题：人与动物 难度：★★★★★ 建议用时：7 min 正确率： /10
（原创）Scientists in Tanzania have trained rats to help detect illegal wildlife products being smuggled(走私) out of the country. The rats have learned to recognize the smell of these items, and can alert(向……报警) their handlers when they find 1. (they). The program is still being tested, but the method could help protect some 2. (danger) animals.
Stopping illegal wildlife trade is hard. People who smuggle these products often hide them in tricky ways. They might paint an elephant tusk(牙) black, or try to make pangolin(穿山甲) scales look 3. candy or chocolate. They might hide the products in a false bottom in a box. Often, they try to cover the smell of these items with other things that have strong smells, such as coffee.
African giant pouched rats are 4. (large) rats in the world. They measure up to three feet(one meter) long(tail included), and weigh about three pounds(1.4 kilograms). Their name comes from the special pouches in their cheeks 5. they store food.
These rats are clever. They learn quickly, and have a strong sense of smell. In the past, these rats 6. (use) to find land mines, sniff out diseases, and help search for people after earthquakes.
The rats are trained 7. (use) food rewards. They are first taught to stick their noses into a hole. Next, the scientists train them to identify certain smells. 8. (final), the rats are taught about smells they should ignore—smells that might be used to cover up the smell of the wildlife.
When the rats are working, they wear special vests. 9. the rat detects one of the smells it 10. (look) for, it grabs a little ball on its vest and pulls on it. This action sets off a beeping sound so that the rat's handlers can come to investigate.

训练2 【语篇解读】本文是一篇说明文,讲述了坦桑尼亚的科学家正在尝试训练非洲巨颊囊鼠来侦查走私的非法动物制品。
1. them 根据空前动词 find 可知,这里需要填写代词 they 的宾格形式作宾语,故填 them。
2. endangered 根据句意可知,这个项目仍在测试当中,但是这种方法可以保护一些濒危动物,本空后有名词 animals,所以这里要填一个修饰 animals 的词,形容词修饰名词,又根据句意可知,需要保护的是濒危动物,故填 endangered。
3. like 根据句意可知,走私犯有时候会把穿山甲的鳞片做得像巧克力或者糖果一样。这里需要填写一个介词,like 作为介词有"像"的意思,故填 like。＞＞ 介词
4. the largest 根据"They measure up to three feet(one metre)long(tail included), and weigh about three pounds(1.4 kilograms)."可知,这里说的是非洲巨颊囊鼠的大小,根据后文可知,这种老鼠很大,是世界上最大的老鼠,这里用最高级形式,故填 the largest。
5. where 根据"Their name comes from the special pouches in their cheeks ... they store food."可知这里是定语从句关系词,整个定语从句修饰名词 pouches,它们在颊袋里储存食物,这里相当于 in which,故填 where。
6. have been used 根据"In the past, these rats ... (use) to find land mines, sniff out diseases, and help search for people after earthquakes."可知,这种老鼠之前就被用作排雷、嗅出疾病和震后救援,之前是这么用,现在还是,所以要用现在完成时,老鼠和使用之间是被动关系,故填 have been used。
7. using 根据句意可知,老鼠是用奖励来训练的。这里的填空处是非谓语动词表示方式,要用动名词形式,故填 using。
8. Finally 根据前文的"first"和"Next"可知这里表示的是一个顺序,句首首字母大写,故填 Finally。
9. If 根据句意可知,如果老鼠侦查到了一种它正在搜寻的味道,那么它就会抓住背心上的球猛拉。这里是个条件状语从句,句首首字母大写,故填 If。＞＞ 连词
10. is looking 根据句意可知,这种味道是它此时正在搜寻的味道,所以用现在进行时,故填 is looking。