最常引起完全无尿的是（）
A.肾前性肾衰
B.肾后性肾衰
C.性肾衰
D.前列腺增生症
E.挫伤
参考答案：B
As Chinese students, every day we have___________ homework to do and we are_________ tired.
A．too many; too much
B．many too ; much too
C．too much ; much too
D．much too ; too much
