问题
选择题
---- Where is mother?
---- She is in the kitchen. She ______ the housework all morning.
A．was doing
B．has done
C．has been doing
D．is doing
答案
答案：C
考查时态。根据all morning整个上午，可知应该使用现在完成进行时。句意：—你妈妈在哪里？—她再厨房。她一直在做家务。