— Spacecraft “Discovery” has failed in the course of launch.
— _______? They have been preparing for the test.
| A．How come | B．When | C．How | D．Why not |
—_____ you _____ the editor at the airport?
— No, he _____ away before my arrival.
| A．Have...met； has driven | B．Had...met； was driven |
| C．Did...meet； had been driven | D．Have...met； had driven |
Look at this! I＿＿some magazines and _____ this letter.
| A．was looking through； found | B．am looking through； find |
| C．looked through； had found | D．had looked through； finding |
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 p.m., so I have to be at the airport by 6:40 at the latest.
| A．has left | B．is to 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 |