--Hi,Tracy,what are your parents doing?--They___the living room the whole morning
问题描述：
--Hi,Tracy,what are your parents doing?--They___the living room the whole morning
--Hi,Tracy,what are your parents doing?
--They___the living room the whole morning.
A.will paint B.had painted
C.have been painting D.was paintig
答
C 现在完成进行时,表示 动作从过去持续到现在,仍然在进行,或刚刚停止但上面用的是现在进行时！现在完成进行时， 可以表示现在仍然在进行啊， 不矛盾啊...