题目

根据下列句子及所给单词的首字母写出所缺单词。（每空限填一词） 1. When I was younger, my h___________ was collecting stamps, but now I like painting. 2. Don’t f___________ to turn off the lights when you leave the classroom. 3. I’m feeling h___________ now. Where can I get something to eat? 4. The box is too heavy for me. Would you please help me c___________ it? 5. I’m dreaming of a white Christmas because it never snows in w___________ in Guangzhou.函数的定义域为（    ） A．              B． C．               D．