21. Have you heard _____ news？The price of _____ petrol is going up again！
A. the； the B. the； 不填 C. 不填； the D. 不填； 不填
22. ---May I borrow your bicycle for a day, David?
---Oh, sorry! My bicycle is not ，and it is being mended.
A. legal B. available C. positive D. constant
