【简答题】A.She couldn't have left her notebook in the library. B.She may have put her notebook amid the journals. C.She should have made careful notes while doing reading. D.She shouldn't have read his notes w...
【判断题】丹霞地貌为红色砂砾岩,在内外营力作用下发育而成的方山、奇峰、赤壁、岩洞等特殊地貌。这种地貌最早发现于广东仁化丹霞山。
【简答题】He had learned Chinese _________ he came to China.
【简答题】建筑管道工程分类,按输送介质划分可分为:给水管道、( )等。
【多选题】丹霞地貌发育在红色砂砾岩地区,为红色砂砾岩在内外营力作用下发育而成的特殊地貌,属于此种地貌的景区有( )。
【单选题】-Why are you so late,Tom? -I was on half the way when it_________to me that I had left my notebook at home,so I had to fetch it. [ ]
【单选题】He had learned enough German to _____ a conversation. [ ]