-You could have asked your teacher for help. She was free. -Yes. A whole day___
With our knowledge _________ practice, we can make contributions to our society.
My sister_______ the League last month and she has decided to _______ the activity to help the aged next week.
Life would be happier if we could only be born at the age of eighty and ________reach eighteen.
You’d better get the second-hand car ________ before you sell it.
They believe that there is _________ in the world.