Ⅰ单选题（25分）
1.Although as 11-year-old student in this modern society, Tom understands __ idea of green life better than his parents.
A. a; an B. a; the C. the; an D. an; the
2. The shoes are _____ than I expected.
A. far expensive B. far too expensive
C. far much expensive D. far more expensive
3.We'll have a _________ holiday, what about going to Huang Shan ?
A. seven days B. seven day C. seven-day D. seven-days
