It is strange that the small boy _________ work out such a difficult exercise, which is even hard to settle for adults.

— I didn’t go to class last night because my car broke down.— You            mine. I wasn’t using it.

Such a businessman ____ honest; he gets his money by dishonest ways.

The patient insisted that he _______ ill and _______ to the hospital.

—The research on the new bird flu virus vaccine is challenging and demanding. Who do you think can do the job?—____ my students have a try?