选词填空。that foot the fall do try they slow

问题填空题

选词填空。

that foot the fall do try they slow both of

     Galileo, lived in the city of Pisa, where there is a leaning tower about 180    1   high. From the top     2
the tower Galileo dropped a light ball and a heavy ball exactly at    3   same time. They    4   fell at about the
same speed and hit ground together. He    5   it again and again. Every time he got the same result. At last, he
decided    6   he had found the truth about     7   objects. As we know now, heavy objects and light objects
fall at the same speed unless air holds    8   back. A feather falls    9   than a stone only because the air holds
the feather back more than it    10   the stone.
1.______ 2.______ 3.______ 4.______ 5.______
6.______ 7.______ 8.______ 9.______ 10.______

答案

1. feet 2. of 3. the 4. both 5. tried

6. that 7. falling 8. them 9. more slowly 10. does