Nuclear science should be developed to benefit the people _____ harm them.[ ]

For many years,people _____ electriccars. However, making them has been more difficultthanpredicted. [ ]

Luke, I can’t find my textbook. — Sorry. I have taken _______ by mistake.

All these postcards must be mailed at once in time for the Spring Festival.

Susan decided not to work on the program athome because she didn’t want her mother to know what she _____.