题目内容
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[单选题]
In ______ experiment, thirty children were divided into three groups.
A.a such
B.such one
C.one such
D.such as
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题目内容
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题目内容
（请给出正确答案）
A.a such
B.such one
C.one such
D.such as
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A.worth
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C.successful
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A.so interesting
B.enough interesting
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After the first experiment, the scientists believed that______.
A．Rico could figure out the meanings of certain words
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A.talk with customers and suppliers
B.collect data on the Internet
C.observe what happens
D.do experiment
A. carry on
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C. carry away
D. carry forth
