The scientist did ＿＿ experiments to test the new drug.A．a series ofB．a good many_刷题宝

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The scientist did ＿＿ experiments to test the new drug.

A．a series of

B．a good many of

C．a great many

D．a lots of

上一题下一题 0.85难度单项选择更新时间:2010-08-20 09:11:23

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