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?

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?