Bitten twice, the postman refused to ______ our letters unless we changed our dog.
The government has to close those small factories to prevent the water of the river ______.
We agreed to accept ___________ they thought was the best engineer.
------Would you mind me smoking here? ------- ______. It’s non-smoking area here.
Nuclear science should be developed to benefit the people _____ harm them.
It is a great pleasure for a woman to ________ the price while shopping.