—Tomorrow ____ my birthday. I’d like you and Jane to come.
—I’m not sure if she ____ free.
| A．will be; is | B．is going to; is | C．is; is | D．is; will be |
The main cause of HIV / AIDS infection in China is drug abuse, ______ is very serious in Yunnan.
| A．what | B．who | C．that | D．which |
It is reported that some mainland visitors to Hong Kong Disneyland didn't _______ the park rules and behaved improperly.
| A．get across | B．keep to | C．take up | D．make up |
Signnatel Inc, ______ world's largest maker of controller chips for MP3 players, is set to establish _______ new R & D centre in Hong Kong and open two sales offices on China's mainland.
| A．the; a | B．the; the | C．a; the | D．a; a |
__________ some medals came to live in the sea is not known.
| A．Which | B．Since | C．Although | D．How |
--Nancy is not coming tonight. --But she __________!
| A．promises | B．promised |
| C．will promise | D．had promised |