怎么做这些英语题目

1. The car is running about sixty miles __an___ hour.
2. My friend is interested in ___/____ science.
3. Don't worry,we still have __a___ little time left.
4. John is ___the_____ cleverest boy in his class.
5. March 8 is ___The____ Women's Day.
6. ___The______ Greens will come to see you tomorrow.
7. Here is __a___ black blouse, ___the__ blouse is hers.
8. They have __/___ bread for __/___ dinner.
9. I prefer playing __/___ piano to playing __/___ basketball.
10. We can't see ___the___sun at __/___ night.
11. Students often play ___/__ volleyball in __the___ afternoon.
12. There is __an___ “x” in __the___ word “six”.
13. ___The__ Yellow River is __the____ second longest river in China.
14. __An__ old man in black has waited for you for half __an___ hour.
15. Have you had __/___ lunch yet?