Medical research has shown that the widespread use of cigarettes contributes ___ the increaseof cancers.
(A)to
(B)for
(C)with
(D)towards
出自：郑州工程技术学院-大学英语1
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Medical research has shown that the widespread use of cigarettes contributes ___ the increaseof cancers.
(A)to
(B)for
(C)with
(D)towards
出自：郑州工程技术学院-大学英语1