完形填空（Cloze）：（共15小题，计15分）
A）阅读下面对话，根据上下文从所给的10个词语中选择7个并用其适当形式填入空中。
（easy，think，call，develop，go，only，sell，do，interest，make）
When Bill Gates was 13 years old，he started to play with computers．Atthattime，computers were very large machines．Once he was （51）in a very old computer．He and some of his friends spent lots of time （52）unusual things with it．In the end，they worked out a software programme with the old machine．
Bill （53）it for 4，200 dollars when he was only 17 years old．
In 1973，Bill went to Harvard University．At Harvard，he （54）the BASIC language for the first microcomputer．In his third year， he left Harvard to work for a company （55）Microsoft．Bill began this company in 1975 with his friend Paul Allan．They （56）that the computer would be a very important tool in every office and in every home，so they began developing software for personal computers．They improved the software to make it （57）for people to use computers．
B）在下面短文空白处填入一个适当的词，形式不正确不得分。
Even if you are a good high-jumper，you can jump only about seven feet off the ground．You cannot jump any（58）because the earth pulls you hard．The pull of the earth is called gravity（地球引力）．
You can（59） find out the pull of the earth．If you weigh（60） ，you will know how much gravity is（61） you．
Since there is gravity，water（62） down hills．When you throw a ball into the air，it falls back down．Because of gravity，you do not fall off the earth as it whirls（旋转）around．
Then，can we get away from the earth and（63） far away into the space？Now you can do it，because spaceships have been（64） ．The spaceship will go so fast that it can escape the（65） gravity and carry you into the space．
参考答案：
51．interested 52．doing 53．sold 54．developed 55．called 56．thought 57．easier
58．higher 59．easily 60．yourself 61．pulling ／drawing 62．runs 63．go
64．invented ／produced ／made ／used 65．earth's ／GREat
