2. 外语
  3. A、They are tough. B、They are costly. C、They are helpful. D、They are too short. B

A、They are tough. B、They are costly. C、They are helpful. D、They are too short. B

admin2022-07-23  17
问题
选项 A、They are tough.
B、They are costly.
C、They are helpful.
D、They are too short.
答案B
解析
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大学英语四级

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