In the past,ice ______food.
| A．used to keep |
| B．used to be used for keeping |
| C．was used to keeping |
| D．used to be used to keeping |
Most of __________we call geniuses (天才)are successful only because they have made extraordinary efforts.
| A．whom | B．who | C． what | D．which |
—Did you get my letter?
—I received one just as I__________.
| A．set out | B．had set out | C．was setting out | D．would set out |
When she called at his studio, she__________that he had gone to Japan.
| A．is told | B．was told | C．tells | D．told |
Robert made a call to his parents yesterday afternoon. To his disappointment, __________of them answered it.
| A．either | B．both | C．none | D．neither |
I __________stop by sometime and thank her for all her help.
| A．must | B．would | C．could | D．ought |