题目

下列地区中，以旱地为主的是（ ） A . 长江中下游平原 B . 华北平原 C . 青藏高原 D . 珠江三角洲 答案：B-Did you catch what the teacher said?-No. She spoke so fast _____ I couldn't hear her very clearly. [     ]A. whichB. thatC. whenD. since