单项选择题
M: I thought that computer cost 4,000 dollars. W: It used to, but the shop owner has improved the price by 500 dollars.
A.4,500 dollars, B.4,000 dollars. C.5,000 dollars.
A.3. B.4. C.5.
A.Typing a report. B.Rewriting a report. C.Reviewing a report.