The old man has four sons, and two _____ turned doctors．
| A．of which | B．of whom | C．of them | D．of that |
－Boy，which website are you surfing on the Internet now?
－Oh，Mum...________I tell you everything I do?
| A．Must | B．Should |
| C．Can | D．Shall |
Visitors are deeply attracted by the 10，000squaremeter skiing park，________is among the biggest in Asia.
| A．that | B．it |
| C．which | D．what |
Several large musical companies are reported________with major online music providers in China at present about charging individual users for music downloads.
| A．discussing | B．to discuss |
| C．having discussed | D．to be discussing |
The pursuit of happiness is just a/an________of personal choice.
| A．event | B．incident |
| C．matter | D．affair |
My grandma will stretch her arms out to hug me________I turn up to see her.
| A．until | B．while |
| C．the moment | D．by the time |