The young boy has come to himself in hospital now. But he ___ unconscious for three days.
| A．has been | B．was | C．had been | D．is |
I can’t connect my computer to the Internet. There must be ________ wrong with it.
| A．something | B．everything | C．anything | D．Nothing |
Work hard at your lessons, ______ you’ll fail the exams again.
| A．and | B．but | C．or | D．which |
We’ll never forget the days ______ we lived in the country.
| A．when | B．where | C．which | D．不填 |
I am sorry I didn’t hear you clearly. _____you repeat it please?
| A．Could | B．Must | C．May | D．Need |
—I regret____ to tell ____you that John has been fired.
—I can hardly believe my ears. He is such a fine worker.
| A．telling | B．having told | C．to tell | D．to have told |