----You seem to have known Dr Smith for a long time.
---- That’s true. ______ he joined our club six years ago.
| A．Since | B．Until | C．When | D．Before |
_______ the difficulty that he has supporting his big family, he still makes every effort to realize his dream, which I believe is __________ his reach.
| A．Despite; within | B．Though; beyond | C．Though; within | D．Despite; of |
The government has raised the tax on urban building (房产税) with the ______ of controlling the price of buildings.
| A．intention | B．introduction | C．purpose | D．development |
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．/; / |