China always plays ___ active part in fighting against ___natural disasters.A. /; the B. an; theC. an;/ D /; /
When Jennifer stepped in quietly, her mother, ____ on the bed, was sleeping sound.
Facing the poor grades, Maria is wondering what it to learn English well.
—Guess what? I happened to have met Mark at the party last week. —If my memory serves me correctly, you two ______ each other for almost ten years.
—What should you do if you have problems with your life? — .
—Thanks for your help, but can you do me one more favor, please? —______, sir.What's it then?