－He is eager to try something he has never tried before．
－Oh,I see．That，s ______he's different from others．
| A．when | B．what | C．how | D．where |
Some animals hibernate in the snow, which can ______ the cold.
| A．keep out | B．keep off | C．keep up | D．keep back |
Had I got to the airport earlier, I _______ you.
| A．might not miss to see | B．would not have missed seeing |
| C．should not miss seeing | D．would not have missed to see |
It’s said that _______ of the students _______ absent.
three-fifth, are B. three-fifths, is C. third-fifth, is D. three-fifths, are
Teaching year after year, he gradually ________much experience.
| A．calculated | B．accumulated | C．abandoned | D．appointed |
Do you know _______ expense the trip will be?
| A．at which | B．in which | C．at whose | D．in whose |