The effect of the medicine on this kind of disease remains .A. seenB. to be seenC. seeingD

发布时间：2020-08-17 12:00:10

The effect of the medicine on this kind of disease remains     .
A. seen
B. to be seen
C. seeing
D. to see

网友回答

A. seen
(答案→)B. to be seen
C. seeing
D. to see
解析：题意为“这种药对这种疾病的效果尚待观察。”由题意可知，remain在此是用作系动词，且see这一动作还没有发生，答案锁定在B和D中间；the effect和see之间是被动关系，所以答案为B。
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