When ________how a statue from distant Greece, in China, researchers explained that it was no doubt a result of Alexander the Great’s influence.
| A．they were asked; should appear |
| B．being asked; can have appeared |
| C．asked; must have appeared |
| D．asked; could have appeared |
_________ in the fields on a March afternoon，he could feel the warmth of spring．
| A．To walk | B．Walking |
| C．Walked | D．Having walked |
He was busy writing a story，only _________ once in a while to smoke a cigarette．
| A．to stop | B．stopping |
| C．to have stopped | D．having stopped |
_________ the project as planned，we’ll have to work two more hours a day．
| A．Completing | B．Complete |
| C．Completed | D．To complete |
. We finished the run in less than half the time _________．
| A．allowing | B．to allow |
| C．allowed | D．allows |
The trees _________ in the storm have been moved Off the road．
| A．being blown down |
| B．blown down |
| C．blowing down |
| D．to blow down |