A．markB．checkedC．populationD．destroyedE．chemicalsInTanzania，anAfricancountry，acompanycalledAPOPOtrainsAfricanpouchedrats（非洲有袋鼠）tofindlandmines（地雷）leftoverfromthewars．Theratsaretrainedtosm

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 （46）___  in them．More importantly，these rats are too light to set off the landmines．
Generally speaking，after 8to 12months 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 （47）___，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 （48）___ each spot on a map．Later，people set off the landmines safely．
In the African country of Mozambique，nearly half of the （49）___ are younger than 15years 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

46．E，考察名词辨析及上下文理解，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）．因此选择E．47．B，考...