无效经济合同的财产后果，可按( )。
A．追究违约金
B．返还财产
C．赔偿损失
D．追究处罚金
E．追缴财产
参考答案：B,C,E
There are a lot of people, so we need a____room. [ ]
A. large
B. small
C. nice
D. dirty
