问题
选择题
They advised him to give up smoking, but he didn'tlisten. So their attempts were __. [ ]
A. in style
B. in action
C. in time
D. in vain
答案
答案：D
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They advised him to give up smoking, but he didn'tlisten. So their attempts were __. [ ]
A. in style
B. in action
C. in time
D. in vain
答案：D