- How long did David work here?
- For half a year, he didn't leave much on us.
A. expression
B. instruction
C. conclusion
D. impression
网友回答
A. expression
B. instruction
C. conclusion
(答案→)D. impression
解析：考查名词辨析。句意：--大卫在这里工作了多久？--四年半，他没有给我们留下太深的印象。leave an impression on sb给某人留下印象。A表情；B指示，说明；C结论；D印象。故选D。