2. 外语
  3. Once a _______ is formed it is very difficult to shake it off.

Once a _______ is formed it is very difficult to shake it off.

admin2009-02-10  51
问题 Once a _______ is formed it is very difficult to shake it off.
选项 A、habit
B、custom
C、practice
D、usage
答案A
解析 habit意为“癖好，(个人的)习惯，习性”；custom意为“习俗，惯例”；practice意为“惯例，常规”；usage也有“习俗，习惯，惯例”之意，但不太常用。
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