You may imagine what great difficulty I had_________ complicated ideas in simple English.
| A．expressing | B．to express |
| C．expressed | D．express |
——＿＿＿＿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 |