In such a fierce competition, a person has to make every effort if he ______ .

—Have you worked here since you graduated?—No, I ________ at a factory in Beijing for six years.

—I’m trying to find yesterday’s paper. Have you seen it?—I’m afraid I ______ it away. I thought you had finished reading it.

The teacher would rather the boy ________ what she demands ________ him to set the bird ________ free . 

.Mother wanted to be a good provider, a role she________since her marriage to Father.