题目

“Don’t go out _______ the rain _______ an umbrella,” mother shouted _______ me. A. in; on; at  B. under; with; to C. under; without; at  D. in; without; to 答案：D 解析: 表示在自然现象“雨中，雪中，雾中”，均用介词in，如:They were caught in a heavy rain yesterday.介词at和to均可表示“朝……”，如:He called out to me.根据句意可知“没带雨伞别跑到雨中去”。因此第二空选without。已知1999×△+4×□=9991，其中△，□是自然数，那么□=19981998．