问题
选择题
—I heard the peasants here very poor in the past.
—Yes,but there great changes in the past few years.
A．have been;have been
B．have been;were
C．were;have been
D．were;were
答案
答案：C
此题的时间概念很明确，in the past指过去时间，而in the past few years常与现在完成时连用。