阅读短文，从方框中选择适当的词，并用其适当形式填空。有的需要加助动词(do或does)或不定式符号(to)。（每词限用一次）

Helen White is a nice girl. Her 小题1: name is Helen. She likes(小题2: _ tennis, she thinks it's interesting. But she小题3: playing volleyball, because she thinks it's boring. She小题4: two volleyballs, a baseball and some ping-pong balls. She often goes to school with her friends. And after school, they play games together. Helen eats well, she likes小题5: and fruit very much . She doesn't want to be fat.

在2001年发生在美国的“9.11”事件中，有一名职员为求生存，从46层楼跳了下来。已知每层楼的高度为4米，如果认为此人在整个过程中做的是自由落体运动。（g=10m/s²）求此人：

（1）整个下落过程中所用的时间是多少？

（2）此人落在地面上时的瞬时速度为多大？

（3）此人最后1秒下落的高度为多少？