We can’t go on with the experiment because the computer_________.
| A．hasn’t been repaired | B．hasn’t repaired |
| C．is not repaired | D．hadn’t been repaired |
Tom sat under a tree and seeing his friend, __ up in no time.
| A．to stand | B．standing | C．stood | D．would stand |
I saw him ______ at desk, reading.
| A．sat | B．seated | C．seating | D．seat |
I used to drink a lot of tea but these days I ______ coffee.
| A．prefer | B．preferred |
| C．had preferred | D．am preferring |
--- Did he notice you enter the room?
--- I don’t think so. He ______ to the radio with his eyes shut.
| A．listened | B．was listening |
| C．has listened | D．had listened |
--- Alice came back home the day before yesterday.
--- Really? Where ______?
| A．has she been | B．had she been |
| C．has she gone | D．had she gone |