Let’s talk about the persons and the things ________ we can remember.
| A.which | B.whom | 
| C.that | D.what | 
_______ 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./; / |