Just as most people have realized, jogging is a cheap, quick and ___________ way to maintain physical fitness.
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They built huge houses in the 17th century in Moscow _____________________(用传统的俄国建筑风格).
____________________(如果你在这次竞争中调整了你的策略), you would have made greater achievement than this.
Experts say that kids of five-year-old can __________ (流利地说母语了).
I looked at his photo album in his drawer _______________ (仅仅是出于好奇).