2. 外语
  3. Your dog needs at least 20 minutes of vigorous exercise every day．

Your dog needs at least 20 minutes of vigorous exercise every day．

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问题 Your dog needs at least 20 minutes of vigorous exercise every day．
选项 A、physical
B、energetic
C、regular
D、free
答案B
解析 划线词为形容词，意思是“精力充沛的”，与B项energetic(精力充沛的，有活力的)为同义词，又如：He is constitutionally energetic．他体质强健，精力充沛。A项意为“身体的”，例：Youth is the time of physical growth．青年时期是长身体的时期。C项意为“有规律的”．例：He leads a regular life．他过着有规律的生活。D项意为“自由的”，例：Everyone is free to express himself．每个人都可以畅所欲言。
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