单项选择题
A. I'm not sure. It depends on the mode your partner chose
B. I'm not sure about that. It is a big city
C. I don't know for sure. It is quite busy now in our bank
单项选择题 A:The senior managers need the results from last month straight away, so I cant stop to talk. Ive got to hurry. B:（）
单项选择题 A:Hello, David! I havent heard from you for a long time. How have you been recently? B:（）
单项选择题 A free market is an economic system in which the price of goods and services is affected by supply and demand rather than controlled by a government. 这句话翻译成中文是（）