—lt is said that we will have another examination next week.  

—Really? __________,we must begin to prepare right now.   [ ]

A. If so              

B. If possible  

C. If not            

D. Otherwise

卵巢内有卵泡发育成熟，子宫内膜会产生何种变化()

A．增生期变化

B．分泌期变化

C．月经期变化

D．月经前期变化

E．蜕膜变化