Complete the sentences with the given words in their proper forms (用括号中所给单词的适当形式完成下列句子。每空格限填一词)
Climb up to the ____ floor, and you can enjoy a better view. (eleven)
____ , Grace made up her mind to live abroad with her daughter. (final)
It is a very ____ book for language learners to improve writing skills. (use)
Don't worry about your son. He is old enough to be independent and live by ____ . (he)
The movie KungFu Panda II is sure to ____ a large number of teenagers. (attractive)
If you don't go on a diet, it is ____  for you to lose weight. (possible)
The local people had to move away because of the serious ____. (pollute)
The great ____  gave his first show in Shanghai and the tickets sold out in minutes. (art)

陇海铁路分别在徐州、郑州与下列哪条铁路线相交（　　）

某校生物兴趣小组使用显微镜观察人体口腔上皮细胞，但下列镜头上所标注的放大倍数模糊不清(如下图)。现欲使视野中看到的细胞数目最少，应选用的镜头组合是(    )