Within the last year, scientists have come closer than ever .A．to deciding which of the questions is rightB．to decide which of the questions is rightC．deciding whether the question is right or notD 题目和参考答案——青夏教育精英家教网—

题目内容

Within the last year, scientists have come closer than ever .

A．to deciding which of the questions is right

B．to decide which of the questions is right

C．deciding whether the question is right or not

D．and decided which of the questions is right

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