.
The driver was at ______ loss when ________ word came that he was forbidden to
drive for speeding.
| A．a, the | B．/ , / | C．the, the | D．a, / |
Only when __________ senior high school __________ to show a great interest in poems.
| A．did I enter; did I begin | B．did I enter; I began |
| C．I entered; I began | D．I entered; did I begin |
---Why are you still here? Everybody has gone to attend the lecture by the president.
--Oh, I ___________ about it!
| A．wasn’t informed | B．hadn’t been informed |
| C．haven’t informed | D．didn’t inform |
Mr. Duncan raised an unnecessary question __________ he then failed to find an answer.
| A．to which | B．for which | C．with which | D．by which |
—What do you think of his speech at the court?
—Er..., sorry, I ________ about something else.
| A．had thought | B．thought |
| C．was thinking | D．have been thinking |
We still remember once _________ round the famous tower when we were young.
| A．having taken | B．to be taken |
| C．having been taken | D．to have taken |