. —John has put forward _______ most challenging question for us to answer.
—Yes, it really is. I have never heard _______ harder one.
| A．the; 不填 | B．不填; the |
| C．the; the | D．a; a |
---How about your trip to Italy?
---Oh, ________ the fine weather, we enjoyed ourselves indeed.
| A．in regard to | B．thanks to | C．in spite of | D．regardless of |
----Hi, Tracy; how are you doing?
-----I’m tired out, for I ______my living room all day.
| A．painted | B．had painted |
| C．have painted | D．have been painting |
Sandy could do nothing but ______ to his teacher that he was wrong.
| A．to admit | B．admitted | C．admit | D．admitting |
He hurried to the booking office, only ________ that all the tickets had been sold out.
| A．to tell | B．to be told | C．telling | D．told |
Victor 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 |