第二部分：英语知识运用(共两节，满分45分)
从A、B、C、D四个选项中，选出你可以填入空白处的最佳选项。
第一节：单项填空(共15小题；每小题1分，满分15分)
16. ---- Hey, dad. ______ ?
---- I can’t find my glasses.
A. How are you B. So what C. What’s up D. What is it like
17. Throughout history, the rainbow ____ a source of mystery and legend.
A. was B. has been C. had been D. is
18. As global warming increases, the Earth will become less and less suited to life, and many species will face ____.
A. extinction B. direction C. caculation D. application
19. QQ, ____ you can chat with your friends, makes communication easy.
A. as B. where C. that D. which
20. People who get plenty of daily liquids from plain water ____ other drinks tend to be much healthier.
A. more than B. other than C. better than D. rather than
21. When we are young, questions of ____ we want to be when we grow up are common.
A. which B. who C. what D. why
22. ---- Have you been to the Great Wall?
---- Perhaps not in my memory. ______, it might have been during my early childhood.
A. If any B. If ever C. If not D. If possible
