o_ _ _ _ _ n.(countable) possibility or choice; sth.that you can choose to have or do

There is a U. N. convention that can cover ______.A．problem between neighborsB．problem bet

在I／O设备、数据通道、时钟和软件这4项中，可能成为中断源的是________。A.I／O设备B.I／O设备和数

The purpose of this passage is to______.A．introduce the history of M. E. N. S. A.B．tell th

According to the U. N. Environment Program, good management of chemicals could protect____

The U. N. agency urged Asia to______.A．stimulate trade and investment in the cross－border

Only VIPs have the_____of using the private beach.A．privilegeB．allowanceC．occasionD．possib