题目

河蚌、蜗牛、乌贼等都是软体动物，它们具有的共同特征是(     )     A．有坚硬的贝壳   B．身体柔软，用鳃呼吸     C．有肥大的斧足   D．鳞片细小，用鳃呼吸 答案：BIt rained continuously for about 3 hours on the way, completely _____ his appointment with the interviewer.A. ruined B. ruining C. to ruin D. ruins