____for the doctor's careful treatment, he____till last year.
| A．If it is not; can't live | B．Were it not; couldn't live |
| C．Had it not been; couldn't have lived | D．If they were not ; couldn't live |
—Waiter!
—__________
—I can’t eat this. It’s too salty.
| A．Yes, sir? | B．What? |
| C．All right? | D．Pardon? |
We will debate the subject_____ late when we have enough time.
| A．in vain | B．at length | C．at last | D．in force |
We will debate the subject_____ late when we have enough time.
| A．in vain | B．at length | C．at last | D．in force |
We will debate the subject_____ late when we have enough time.
| A．in vain | B．at length | C．at last | D．in force |
While watching television, __________.
| A．the doorbell rang | B．the doorbell rings |
| C．we heard the doorbell ring | D．we heard the doorbell rings |