(A) on which to base
(B) which to be based on
(C) to base on which
(D) on which to be based
出自：郑州工程技术学院-大学英语（2）
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(A) on which to base
(B) which to be based on
(C) to base on which
(D) on which to be based
出自：郑州工程技术学院-大学英语（2）