3.——()hashebeeninBeijing——Sincehewasthreeyearsold.AHowsoonBHowlongCHowoftenDwhen4.Hetried()outtheproblem,buthefailed.AtoworkBworkingCworkDworked5.Thedoctorlooked()himandthentoldhimthattherewasn
<p>问题：3.——()hashebeeninBeijing——Sincehewasthreeyearsold.AHowsoonBHowlongCHowoftenDwhen4.Hetried()outtheproblem,buthefailed.AtoworkBworkingCworkDworked5.Thedoctorlooked()himandthentoldhimthattherewasn<p>答案：↓↓↓<p class="nav-title mt10" style="border-top:1px solid #ccc;padding-top: 10px;">龙鹏飞的回答：<div class="content-b">网友采纳 DABBCCBACBBD
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