You can ____ your time about handing in your homework; there is no rush.
The heavy smoker has decided to _____ smoking, for he knows smoking _____ his health.
I wondered _____ they always looked down upon me.
As a result of the serious flood, two-thirds of the buildings in this area _____.
—How about _____ Christmas evening party? —I should say it was _____ success.
Although a large _____ of money was used and a _____ of doctors and nurses lost their lives in fighting against the disease, we were able to win the battle in the end.