问题描述：
He tried to get rid of the man who _____him but in vain.
A.had followed B.has followed C.was following D.would follow
Is this research center___you saw the modern 设备 last year?
A which B that C the one that D the one where
A.had followed B.has followed C.was following D.would follow
Is this research center___you saw the modern 设备 last year?
A which B that C the one that D the one where
问题解答：
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