_____the problem of land erosion getting more serious, the government is searching for a way to deal with it.
| A．As | B．With | C．When | D．If |
—I’m sorry I have failed again in the math exam．
—？You’ve been working hard at the subject．
| A．How | B．How come | C．Why not | D．When |
Everybody had an impression she was a good match for the young man．
| A．that | B．which | C．with which | D．for which |
So amusedthat I couldn’t help laughing when I saw the performance given by the children．
| A．I felt | B．I feel | C．did I feel | D．had I felt |
The students respect their head teacher，although she is strict，she is fair．
| A．since | B．for | C．that | D．because |
After the terrible earthquake，nothing is left the city but sad memories．
| A．from | B．for | C．of | D．at |