____ printed, this science fiction will be popular among the students.
| A．Before | B．Unless | C．When | D．Once |
He ____ writing the paper now. He hadn’t written a single word when I left him ten minutes ago.
| A．shouldn’t be | B．can’t have finished |
| C．can’t be | D．mustn’t have finished |
—Watch!
—I ____ but ____ I ____ anything unusual.
| A．watched; have watched | B．have watched; am not seeing |
| C．was watching; wasn’t seeing | D．am watching; don’t see |
—“Dear Frank, when will our wedding be?”
—“Ah, when? God knows.” He said, and ____ away from her, walked rapidly away.
| A．turning | B．turned | C．turn | D．to turn |
You’d better not wear such ties, because they ____ three years ago.
| A．went on | B．went off | C．went over | D．went out |
To read Tolstoy and ____ to the nineteenth century Russian literature are two excellent reasons for taking Professor Morrel’s course.
| A．to introduce | B．introduce |
| C．being introduced | D．to be introduced |