He apologized for ______ to inform me of the change in the plan.
| A．his being not able | B．him not to be able |
| C．his not being able | D．him to be not able |
Everyone was out of _____ breath after they ran for so long _____ time.
| A．不填; 不填 | B．不填; the | C．a; the | D．不填; a |
— They have discussed the problem for hours.
— Have they come to any_____?
| A．end | B．result | C．conclusion | D．Opinion |
— Do you mind my shutting down the radio?
—_____. The good news will be on the air right away.
| A．Of course not. | B．I’m afraid I do. | C．Why not? | D．Yes, just go ahead. |
—John，when will you pay a visit to that place of interest?
—I can’t decide at present. _______.
| A．It just depends | B．It’s up to you | C．Take your time | D．I beg your pardon |
Gun control is a subject _______ Americans have argued for a long time.
| A．of which | B．with which | C．about which | D．into which |