题目

世界最高峰珠穆朗玛峰的海拔为8844.43米。我国陆地最低点艾丁湖洼地低于海平面154.31米。两地的相对高度是（ ） A . 8844.43米 B . 8998.74米 C . 8690.12米 D . 154.31米 答案：B16、- What were you doing when Tony phoned you ? - I had just finished my work and       to take a shower . A. had started       B. started       C. have started                    D. was starting