- 問題詳情:Thesignsays“Passengers____showtheirticketsandpassports.”Amust Bmay Ccan Dshould【回答】A知識點:情態動詞題型:選擇題...
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- 問題詳情:Passengers________talktothedriverwhilethebusismoving,becauseitwilltakehisfocusofftheroad.【回答】mustn't句意:當公共汽車開動時,乘客不得與司機交談,因為這將把他的注意力從路上轉移開來。此處表示“禁止,不允許”,故用mustn't。知識點:虛擬語氣題型:閲讀填空...
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