胚胎死亡2个月以上尚未自然排出者称()
A．过期流产
B．不全流产
C．难免流产
D．先兆流产
E．以上都不是
参考答案：A
He will not fail the driving test if he keeps .
A．to pass; practicing
B．to pass; to practice
C．passing; practicing
D．passing; to practise
