题目内容：

She ought to stop work; she has a headache because she ___________ too long.(2009 普陀区　二模)
A.has been reading B.had read
C.is reading\x05\x05 D.read
为什么不选B呢?

优质解答

A.has been reading have/has been doing sth现在完成进行时表示动作发生在以前,持续到现在并且有继续发生下去的趋势.B.had read 过去完成时表示动作发生在过去的过去.由she has 可以看出时态是现在时,不能用B.根据...