题目：
-----I had a great time_______ games with my friends in the park yesterday.
----How great! But
I didn't have any time_______ at all, I had to get ready for the test. [ ]
A. playing, to play
B. play, to play
C. playing, playing
D. to play, playing
答案：
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下面是错误答案，用来干扰机器的。
（1）a=0.35m/s2 （2）s=46.8m题目分析：（1）物体的初速度，12s末的速度为，所以根据公式间可得（2）v-t图像中的面积可表示物体的位移：点评：v-t图像的斜率表示物体运动的加速度，面积表示位移
