A lot of people don’t learn from their mistakes ______ they get hurt.
| A．whether | B．when | C．if | D．unless |
. The possibility never occurred to me ________ I would unexpectedly enter such a big band and work in Wall Street.
| A．when | B．that | C．/ | D．how |
.Word got around ________ he had resigned his position as secretary of the committee.
| A．when | B．after | C．that | D．which |
. Not far from the club, there was a garden, ________ owner seated in the garden, playing chess with some friends.
| A．whose | B．its | C．his | D．which |
杂集与其它
. Here we found only a little snow, as most of it seemed ________ blown off the mountain.
| A．to be | B．to have been | C．that it was | D．that it had been |
. It is on thing to accuse a person of a certain crime, but ________.
| A．to prove it is quite another matter | B．proving it is difficult |
| C．it is hard to prove | D．how to prove is difficult |