1. [单选题]某中学正开展“无烟校园”活动。假如你是该校学生，在校园内遇见一位家长正在吸烟，你该怎么劝阻。下列语言最得体的是( )。（2分）
A. 喂，你不知道我们学校正在开展“无烟校园”活动吗？
B. 请不要在校园内吸烟！
C. 您好！我们学校正在开展“无烟校园”活动，为了大家的身体健康，请您不要在这里吸烟，好吗？
D. 吸烟污染环境，损害健康，请你马上停止吸烟！
2. [单选题]Bill Gates(11) on October 28,1955． He grew up in Seattle ,Washington．He was a very(12 ) boy．His favorite subjects at school were science and maths．( 13) he was 13 years old ,Bill started to play with computers． At that time ,computers (14) very large machines．Once he was very interested (15) a very old computer． He and some of his friends (16).lots of time doing unusual things with it． In the end ,they worked out a software program(软件程序：) with the old machine． Bill (17) it for $ 4,200 when he was only 17．
A. in his third year ,he left Harvard to work for a company(公司) called Microsoft． Bill began his company in 1975 (19 ) his friend Paul Allen． They thought the computer would come into every office and every home soon． So they began developing the software for personal computers． They improved(改进) the software to (20) it easier for people to use computer,．
C. is born
D. was born
E. did born
F. born
