若兼腰膝酸软、梦交者宜
A．改用知柏地黄丸
B．改用六味地黄丸
C．改用五子衍宗丸
D．加龟板、熟地
E．加知柏地黄丸
参考答案：E
（1）（3a-4）-3×（a-4）=______
（2）已知a-12=c，那么（a+c+12）÷a=______．
He has _ for ten years. Ten years __________ a long time to him. [ ]
A.left home; are
B. left home; is
C. been away from home; is
D. been away from home; are
