11.A.doubtfully
B.impatiently
C.attentively
D.excitedly
12.A.silently
B.properly
C.violently
D.gently
13.A.innocence
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 timeconsuming 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.
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