When the old man to walk back to his house, the sun itself behind the mountain.
| A．started; had already hidden |
| B．had started; had already hidden |
| C．had started; was hiding |
| D．was starting; hid |
If it were not for the fact that you _____ ill, I would ask you to do this right now.
| A．were | B．had been | C．are | D．should be |
--- “Where have you been?”
--- “I got caught in traffic; otherwise _____ sooner.”
| A．I would be here | B．I have been here |
| C．I had been here | D．I would have been here |
We _____ the work on time without your help.
| A．hadn’t had finished | B．didn’t have finished |
| C．couldn’t have finished | D．can’t have finished |
You _____ such a serious mistake if you had followed his advice.
| A．may not make | B．might not make |
| C．shouldn’t have made | D．might not have made |
If only I _____ my watch!
| A．hadn’t lost | B．haven’t lost | C．didn’t lost | D．don’t lose |