（）是按照考试成绩决定晋升。
参考答案：考试晋升制
葡萄胎的恶变率是（）
A.5%
B.5%～10%
C.10%～15%
D.10%～20%
E.10%～25%
—Do you know about the accident which happened in the center of the city?
—Yes. But it was some time we realized the truth.
A．before
B．when
C．since
D．until
