《工程建设项目货物招标投标办法》规定，履约保证金金额一般为中标合同价的( )以内。
A．5% B．8%C．10% D．15%
参考答案：C
若一个三角形的三个内角度数之比为3：2：1，则与之相邻的三个外角度数之比为（ ）。
You didn’t take his advice. ____ his advice, you _____ such a mistake.
A．Had you taken; wouldn’t have made
B．If you had taken; would make
C．Were you to take; shouldn’t have made
D．Have you taken; won’t have made
