新概念英语第三册第25课的课后练习第4题求解释

问题描述:

新概念英语第三册第25课的课后练习第4题求解释
PS:是语法题
原文:One of the most famous sailing ship of the nineteenth century,the Cutty Sark,can still be seen at Greenwich.
The Cutty Sark _______ at Greenwich.
选项:(a) is still possible to see (b) is able still to be seen (c) may still be seen (d) is still possibly seen
我一看到C选项就选了C,答案也是C,但是看不出来D到底哪里有问题,D选项为什么错了?

possibly seen
是可能看见
只是有可能
题意是能看见
所以D不对