Some women ________ a good salary in a job instead of staying home, but they decided not to work for the sake of the family.

A．must make

B．should have made

C．would make

D．could have made

控制论模式的主要贡献是引入“（）”的机制，变“单向直线性”为“双向循环性”，从而更客观、更准确地反映了现实的传播过程。