保留金的限额一般为合同总价的( )。
A．5%
B．10%
C．20%
D．25%
参考答案：A
---I don’t know what _____ if I do that.
---I think you ______ tell him the whole thing first.
A．happens; should
B．happens; shouldn’t
C．will happen; should
D．will happen; shouldn’t
一般毒性作用
