20. This printer is of good quality. If it _______ break down within the first year, we would repair it at our expense.
| A．would | B．should | C．could | D．Might |
.—What are you reading，Jim?
—I’m not really reading，just________the pages.
| A．turning off | B．turning around |
| C．turning over | D．turning up |
We are looking forward to________a chance to watch the opening ceremony of the London 2012 Olympic Games.
| A．give | B．be given |
| C．being given | D．giving |
The letter he had been looking forward to________at last this morning.
| A．come | B．comes |
| C．coming | D．came |
Though Tom was impolite to the new teacher，she________him his rudeness.
| A．excused | B．apologized |
| C．forgave | D．punished |
_______not to miss the flight at 15∶20，the manager set out for the airport in a hurry.
| A．Reminding | B．Reminded |
| C．To remind | D．Having reminded |