B．curiosity　C．surprise D．happiness

　　14．A.possibly 　

　　B．occasionally　C．rarely D．just

　　15．A.welled B．shone

　　　C．closed

　　D．burned

　　16．A.quick B．different 　C．tiny D．strong

　　17．A.realized B．concluded

　　　C．understood D．reflected

　　18．A.where

　　B．what

　　　C．which D．why

　　19．A.gradually　

　　B．finally　C．generally D．suddenly

　　20．A.When B．Because　C．Although D．Since

　　.阅读理解

　　(2016·河北省普通高中质量检测)

　　In an ideal world，people would not test medicines on animals.Such experiments are stressful and sometimes painful for animals，and expensive and time-consuming for people.Yet animal experimentation is still needed to help bridge vast gaps in medical knowledge.That is why there are some 50 to 100 million animals used in research around the world each year.

　　Europe，on the whole，has the world’s most restrictive laws on animal experiments.Even so，its scientists use some 12 million animals a year，most of them mice and rats，for medical research.Official statistics show that just 1.1 million animals are used in research in America each year.But that is misleading.The American authorities do not think mice and rats are worth counting and，as these are the most common laboratory animals，the true figure is much higher.Japan and China have even less comprehensive data than America.

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