The doctors are doing all that they _____, but the old man is still not breathing properly.
| A．shall | B．need | C．may | D．can |
_____, the players tried their best to win the game for their class.
| A．Greatly encouraged | B．Having greatly encouraged |
| C．To be greatly encouraged | D．When encouraging |
----Did you open the door?
-----Yes. I remembered _____it before you arrived.
| A．opening | B．being opened | C．to open | D．to have opened |
They were so late that they ____had time to catch the train.
| A．almost | B．hardly | C．nearly | D．simply |
----Why can’t I smoke here?
----At no time_____in the meeting room.
| A．is smoking permitted | B．smoking is permitted |
| C．smoking is it permitted | D．does smoking permit |
Helen plays the piano well, ____her favourite instrument is the violin.
| A．so | B．yet | C．or | D．for |