--These days, he has stayed up late into night in order to get good marks in the following monthly test.---It’s no ____ that he seems tired and asleep in class every day.A.wonderB.problemC.doubtD.question
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A解析考查句型：It’s no wonder that难怪怎么样，句意：难怪他看起来很累每天在课上睡觉。故选A。