It’s more than half a century _________ my grandfather joined the Party and became a servant to the people.
| A．when | B．that | C．since | D．while |
In some parts of London, missing a bus means ________ for another hour.
| A．waiting | B．to wait |
| C．wait | D．to be waiting |
—The light in the office is still on.
—Oh，I forgot ________.
| A．turning it off | B．turn it off |
| C．to turn it off | D．having turned it off |
—You were brave enough to raise objection at the meeting.
—Well, now I regret ________ that.
| A．to do | B．to be doing |
| C．to have done | D．having done |
-----Has any of you reached the Great Wall ?
-----__________.
| A．None | B．No | C．No one | D．Not any |
It’s the fifth time ______ late this term.
| A．that you ’ve arrived | B．that you arrived |
| C．when you ’ve arrived | D．when you arrived |