15．We welcome you to use this area for your baby buggy（童車(chē)）．However，________ a wheelchair user board the bus，you are not supposed to use this special area．（　　）
A．wouldB．mightC．shouldD．could

分析 句意：我們歡迎你的童車(chē)使用該區(qū)域，然而，萬(wàn)一一位輪椅使用者上車(chē)，你就不應(yīng)該用這個(gè)特殊區(qū)域．

解答 答案C．"would"表示意愿或過(guò)去習(xí)慣性的動(dòng)作；"might"可能；"should"應(yīng)該，竟然，萬(wàn)一；"could"可能，可能．根據(jù)句意：我們歡迎你的童車(chē)使用該區(qū)域，然而，"萬(wàn)一"一位輪椅使用者上車(chē)，你就不應(yīng)該用這個(gè)特殊區(qū)域．故選C．

點(diǎn)評(píng) 本題考查情態(tài)動(dòng)詞，要掌握詞意并結(jié)合具體的語(yǔ)境選擇出正確的選項(xiàng)．

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