Had they known what was coming next, they ___________ second thoughts.
| A．may have | B．could have | C．must have had | D．might have had |
If there ______ no water or air on the earth, all living things would die.
| A．is | B．were | C．are | D．will be |
--Hello, I’d like to talk to Mr. Wang.
--______, please. He’ll be here in a moment.
| A．Hang on | B．Help yourself | C．It’s my pleasure | D．Wait for me |
Though _____ failure is the mother of success, everyone wishes to have ______ success.
| A．不填; a | B．the; a | C．a; a | D．不填;不填 |
The teacher went for further study and he said he was ______ to come back the next week.
| A．possibly | B．likely | C．perhaps | D．probably |
Roylott was sitting on a chair, with his eyes ______ the window.
| A．fixing on | B．were fixed to | C．fixed on | D．were fixing on |