题目

 . ____ and out of breath, we reached the top of the mountain and stopped ____ the beautiful scenery.     A. Tiring; to admire              B. Being tired; admiring        C. Tired; to admire                 D. Tired; admiring 答案：C把一个钢球浸没在底面直径3分米的圆柱形玻璃缸的水中，水面高度上升2厘米．求钢球的体积．