问题
选择题
Though smoking is not allowed in the public places, many people are still in _______ habit of smoking in the train or bus in _______ public.
A．the；the
B．/；/
C．the；a
D．the；/
答案
D
in the habit of “有……的习惯”是固定结构；in public“公开地，公然地”，也是固定结构。