21. It’s a common ____ to drive on the left in British.
A. sense B. practice C. rule D. reality
22. The government has announced plans to cut back _____ defence spending _____ 10% next year.
A. upon, to B. on , by C. of, by D. for, to
23. I would appreciate _____ , to be frank, if the goods could be delivered as soon as possible.
A. you B. this C. it D. myself
