Had the boy worked harder,he__________the exams.

Everybody had an impression she was a good match for the young man

Since we ____ for almost two weeks, I’ll need to buy a large backpack in advance to carry my supplies of food and water

As the final examinations ______ students begin to busy themselves with reviewing.

In students’ eyes, a good teacher should have many good virtues, but _____, he or she should be knowledgeable[ ]