Your dog needs at least 20 minutes of vigorous exercise every day.A:free B:regul

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

选项 A:free
B:regular
C:physical
D:energetic

答案D

解析这句话的意思是:你的狗每天需要至少20分钟充沛的训练。句中“vigorous”意为“精力 充沛的,有力的”。四个选项中A项意为“自由的”;B项意为“正常的,常规的”;C项意为“体 力的”;D项意为“精力充沛的”。因此只有D项最为合适。
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