It is not yet known how these huge stones were conveyed a distance of 380 kilometres 3 000 years ago.
| A．at | B．for | C．over | D．in |
—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 |
----Marx looks nervous.
----So __________ you if you had so fierce a competition.
| A．do | B．did | C．will | D．would |
_________ caused the accident is still a mystery.
| A．How | B．What | C．That | D．Where |
The sun began to rise in the sky, ________ the mountain in golden light.
| A．bathed | B．bathing | C．to bathe | D．have bathed |