I'm not sure where my necklace is, but I have a pretty good idea who________it．
| A．take | B．took |
| C．had taken | D．will take |
The train ______ at the present speed until it reaches the foot of the mountain at about nine o’clock tonight.
| A．went | B．is going | C．goes | D．will be going |
The plane ______ at 7:00 pm, so I have to be at the airport by 6:40 at the latest.
| A．has left | B．would leave |
| C．will have left | D．leaves |
--- 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 |
--- Where do you think ______ he ______ the computer?
--- Sorry. I have no idea.
| A．has; bought | B．不填; bought |
| C．did; buy | D．不填; buys |
--- 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 |