（文）．在△ABC中，已知sinA：sinB：sinC=3：5：7，则此三角形的最大内角等于______．

根据课文内容填空。（共10个空格, 每空所填词数不定；每空格1分, 满分10分）

小题1:The painter(并不打算) paint objects as we see them with our eyes, but instead               （集中关注） certain qualities of the object, using colour, line and shape to represent them.

小题2:There are           （各种各样的理由）why people write poetry. Some poems tell a story or describe something in a way that will              （给读者留下深刻的印象）. 

小题3:First, you can ____________________ （在身体上对尼古丁有瘾）nicotine, which is one of the hundreds of chemicals in cigarettes. This means that after a while your body _________________ （习惯）having nicotine in it. 

小题4:                 （另一方面）, there are those, like George Hambley, who            ___________________（反对这一观点）, believe that we should not worry about high levels of carbon dioxide in the air.

小题5:Unfortunately, we cannot                （把他们的家搬离岩浆流过的地方）, and many houses have been covered with lava or                     （焚烧殆尽）.