问题
选择题
—I have never been to the Great wall.
—If you have an opportunity _______ there, you must take it.
A．to go
B．to going
C．going
D．go
答案
答案：A
题目分析：句意：我从来没有到过长城。——如果你有一个到那儿的机会，你一定要抓住。动词不定式做目的状语表示具体的将要进行的动作，结合语境可知选A。
