Question

They have made so great progress      .

A．three years ago	B．for three years
C．in the past three years	D．before three years

Answer 1

C

考查時(shí)態(tài)。“in/over/for+一段時(shí)間”常和現(xiàn)在完成時(shí)連用。A用于一般過去時(shí)。句意“在過去的三年里，他們已經(jīng)取得了如此大的進(jìn)步�！惫蔬xC。