It was a great _____ for him to be pleasant to people he didn't like.
| A．attempt | B．trouble | C．power | D．effort |
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 |
—Can those _________ at the back of the classroom hear me?
—No problem．
| A．seat | B．sit | C．seated | D．sat |