15. My new glasses cost me _______ the last pair I bought last month. A. more than three times B. three times as much as C. more three times than D. as much three times as 16. You will find their house __________ you take a good street map with you. A. as long as B. even if C. unless D. otherwise: 17. By the end of last March, I _____ English for five years. A. was studying B. would be studying C. has been studying D. had been studying