养精种玉汤用于治疗（）
A.血瘀不孕
B.肾阴虚不孕
C.肝郁不孕
D.肾气虚不孕
E.痰湿不孕
参考答案：B
-What's up? You look worried.
Well,I_____on the problem for 5 hours but I haven't got a single clue.
A．have worked
B．worked
C．will work
D．have been working
Which of the following signs can be seen on the door of a shopping mall? [ ]
A B C D
