题目

完形填空  阅读短文，从每题A、B、C、D四个选项中，选出一个能填入文章中相应空白处的最佳答案。One morning last summer Joyce Andrews made some sausage(香肠) sandwiches for her husband’s lunch. There was one sausage left over. Mrs. Andrews gave it to Henry, their little  1 . Henry ate it up quickly.During the morning the dog got ill. He wouldn’t  2  shaking his head, and couldn’t stand properly. Joyce thought, “He must have eaten something  3. Maybe that sausage…” she suddenly remembered her husband’s lunch. She ran to the  4  and call用斜面和小车做“测物体的平均速度”实验．当小车自顶端出发时开始计时，滑至斜面底端时停止计时，如图所示．在此过程中，滑块的平均速度是（ ）A. 7cm/s B. 8cm/s C. 9cm/s D. 10cm/s