铸造卡环宽度与厚度的比例为
A．3:1B．3:2C．5:3D．5:4E．2:1
参考答案：D
Her sister ______ a rich man. They ______ for twenty years.
A．married with; have married
B．married to; have married
C．married; have been married
D．has married with; have been married
