问题
选择题
It’s hard for us to make a choice, which means we have not decided _____.
A．to take a step
B．to take which step
C．which step to take
D．to take what
答案
答案：C
本题考查非谓语动词。which step to take是疑问代词+不定式的用法，表示“采取哪一步”。句意：选择对我们来说很难，意味着我们还没有决定将采取哪一步。