I was chatting on the Internet last night when I smelt something in the next room．
| A．burning | B．to burn | C．be burnt | D．to be burnt |
It is the photo we took years ago __________ we were at university_________ often calls up my memories of my college life.
| A．that; that | B．when; where | C．when; that | D．that; where |
—Would you come to our home for a chat right now?
—Cool, _________.
| A．when convenient | B．if you are convenient |
| C．if convenient | D．when you are convenient |
Those citizens who love _________ nature told us that a lot of precious plants in Mount Jinyun stood in _______ danger.
| A．a; a | B．the; the | C．/; the | D．/; / |
— ________ David and Vicky ________ married?
— For about three years.
| A．How long were; being | B．How long have; got |
| C．How long have; been | D．How long did; get |
Many teachers __________ to the meeting are from Chongqing.
| A．invited | B．to invite | C．be invited | D．had been invited |