Many approaches have been _____ to control the spread of the terrible virus “Ebola” so far.
After receiving the Oscar Award, she felt that it was a great _______ to receive it.
—Would you mind my _______ your speech? —Not at all. Go ahead.
You can come ______ on Tuesday _______ on Friday, but whichever you choose, please let me know.
The prisoner of war wished to be _________. Ten years later, he ____ and went home.
Don’t lose heart; __________ difficulties you are faced with will be overcome in the end.