I wish I ____ you yesterday.
| A．seen | B．did see | C．had seen | D．were to see |
English is one of the ______ languages at international meetings.
| A．work | B．working | C．speaking | D．spoken |
The _____, I think, he drew from his simple experiment is not scientific.
| A．conclusion | B．charge | C．promise | D．relation |
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 |