-----Do you usually take a vacation?
-----Yes, I like to go away .
A. one time this year
B. once a year
C. one time a year
D. one time in a year
网友回答
A. one time this year
(答案→)B. once a year
C. one time a year
D. one time in a year
解析： 次数 + a year/ month/ week 是常用固定搭配，表示一年／月／周一次。