—HowlongdidDavidworkhere? —Forhalfayear,hedidn'tleavemu...

来源：语文精选馆 1.73W

—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

【解析】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。expression表情；instruction指示，说明；conclusion结论；impression印象。故选D。