His son learns piano guitar.
A．also
B．as well as
C．too
D．as good as
答案：B
— Could I use your phone for a moment?
— ______. Help yourself. [ ]
A. Take your time
B. Forget it
C. By all means
D. Never mind
下列哪项不是习惯性流产的原因（）
A.黄体功能不全
B.甲状腺功能亢进或低下
C.宫腔感染
D.染色体异常
E.精子缺陷
