投资组合的非系统性风险因素有（）。
A.现金流量失常
B.利率政策变革
C.汇率政策调整
D.税收政策改革
参考答案：A
She wanted to ask if he had news of Williams, but words ________ in her throat.
A．burst
B．stuck
C．broke
D．settled
These shoes look very good. I wonder _______. （2006年上海春季高考题）
A．how much cost they are
B．how much do they cost
C．how much they cost
D．how much are they cost
