题目内容
The new software can help us call a taxi immediately, so we _______ wait too long.
A.needn’t toB.needn’t
C.don’t needD.not need to
B
【解析】
试题分析:句意:这款新的软件能帮助我们立刻打到出租车,因此我们不需要等太长时间。分析:考查情态动词need用法,其否定形式为needn’t.而need做动词的时候,常用短语为need to do sth.故选 B
考点:考查need用法。
A.mark B. checked C. population D. destroyed E. chemicals |
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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.