2. 外语
  3. AMost tree frogs Bchange colors Cfrom time to time to fit in with Dits environment.

AMost tree frogs Bchange colors Cfrom time to time to fit in with Dits environment.

admin2013-10-02  46
问题 AMost tree frogs Bchange colors Cfrom time to time to fit in with Dits environment.
选项
答案D
解析 应改为their。前后对应，tree frogs，所以应为复数。
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