All of the flowers now raised here have developed from those _____ in the forest.
| A．once they grew | B．they grew once |
| C．that once grew | D．once grew |
―What’s wrong with your coat?
―Just now when I wanted to get off the bus, the man next to me ________ on it.
| A．sat | B．had sat |
| C．had been sitting | D．was sitting |
―Are you still busy?
―Yes, I ________ my work, and it won’t take long.
| A．just finish | B．am just finishing |
| C．have just finished | D．am just going to finish |
You ________ to leave until you _______ your work.
| A．won’t be allowed; have finished | B．won’t allow; finish |
| C．won’t be allowed; will finish | D．won’t allow; will finish |
―________ you _________ the chief 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; was driven |
―Did you meet Professor Johnson?
―Yes, but when I arrived, he ________, so we only had time for a few words.
| A．had just left | B．has just left |
| C．was just leaving | D．just left |