单项选择题
The changes in the city will cost us a lot of money, （） they will save us money in the future.
A. or B. since C. for D. but
单项选择题 ——He does not like music, does he——（）
单项选择题 I finally got the job I dreamed about. Never in my life （）so happy.
单项选择题 Mrs. Smith warned her son （）after drinking.
