请从A、B、C、D四个选项中选出可以填入空白处的最佳选项。
1．Black broke his leg. He has just had _____ X-ray examination. ______ doctor said he needed ______ operation.
A. a; The; an B. a; A; an C. an; A; an D. an; The; an
2. Please get up at once, ________ you will be late for school.
A. so B. though C. but D. or
3. —______ do you play sports after school?
— Three times a week.
A. How old B. How many C. How much D. How often
4. The drink is_________ delicious _________ I enjoy it very much.
A. too; to B. so; that C. such; that D. not, but
