题目

长江干流和黄河干流都流经的省区是                                （     ） A．青海、西藏        B．青海、四川         C．青海、甘肃      D．青海、云南 答案：B When you reach the other end of the bridge, I ______ right there to show you the way. A. wait                      B. have waited       C. was waiting               D. will be waiting