Someone is ringing the doorbell. Go and see ____.
| A．who is he | B．who he is |
| C．who is it | D．who it is |
With all the audience ________, the speech began.
| A．sat | B．seating | C．seated | D．having seated |
—Ken, why do you look so tired?
—I _______ myself to the climate since I came here.
| A．didn’t adapt | B．haven’t adapted | C．don’t adapt | D．hadn’t adapted |
Some passers-by witnessed the car accident____ five passengers were killed, a baby included.
| A．that | B．which | C．in which | D．in that |
The girl got nothing in ______ for her kindness, which made her very sad.
| A．prize | B．award | C．reward | D．medal |
—Mary’s got crazy and has been sent to the mental hospital. Did you tell her boss about that?
—Yes, but I _______her husband first.
| A．can have told | B．should have told | C．need have told | D．must have told |