第一产程活跃期的减速期是指宫口扩张（）。
A.9-10
B.3-10
C.7-10
D.5-10
E.8-10
参考答案：A
You _____ pay your library fines. If not, you _____ not be allowed to graduate.
A．may; should
B．should; need
C．must; will
D．will; can
You _____ pay your library fines. If not, you _____ not be allowed to graduate.