_______ is well known _______ Hong Kong returned to China on July 1st, 1997.
| A．It, that | B．As, / |
| C．As, as | D．It, which |
Today we have chat rooms, text messaging, e-mailing...but we seem __________ the art of communicating face-to-face.
| A．losing |
| B．to be losing |
| C．to be lost |
| D．having lost |
So far nobody has claimed the money __________ in the library.
| A．discovered |
| B．to be discovered |
| C．discovering |
| D．having discovered |
-__________ seems to be something wrong with the machine.
-Yes，__________ got a lot of noise.
| A．It; it's |
| B．There; it |
| C．It; there's |
| D．There; there is |
-Hurry up! We still have 30 miles to __________ before dark.
-OK. I will make every effort not to fall behind.
| A．finish |
| B．keep |
| C．pass |
| D．cover |
In autumn, it's beautiful outside with golden fallen leaves __________ the ground.
| A．covering |
| B．to cover |
| C．having covered |
| D．covered |