Help others whenever you can _______ you will make the world a nicer place to live in.
I thought it of great necessity ____ your father’s advice into consideration.
Here ____ the professor and writer as well as his friends.
After summer rain, the rainbow looks more beautiful ____ a blue sky.
-- Mommy, I’d like some more chocolate.-- Sorry, there is ____ left.
The manager made her employees know that hard work would____ one day.