—Watch!
—I ____ but ____ I ____ anything unusual.
watched; have watched B．have watched; am not seeing
C．was watching; wasn’t seeing D．am watching; don’t see
You can borrow my car ___ you promise not too fast.
| A．unless |
| B．even |
| C．in case |
| D．a s long as |
You'd better write down the phone number of the restaurant for future ____.
| A．purpose |
| B．reference |
| C．progress |
| D．memory |
By 16:30, was almost closing time, nearly all the paintings had been sold.
| A．which |
| B．when |
| C．what |
| D．that |
――Look! Somebody ____the sofa..
――Well, it wasn’t me. I didn’t do it.
| A．is cleaning |
| B．was cleaning |
| C．has cleaned |
| D．had cleaned |
It suddenly occurred to him___ he had left his keys in the office.
| A．whether ; |
| B．where |
| C．which |
| D．that |