________ on ten years of observation and study, Professor Wang announced that everyone dreams every night，whether they realize it or not.
| A．Basing | B．Based |
| C．Been based | D．Having based |
It's worth downloading, because it's free and doesn't__________ a lot of disk space.
| A．take up | B．take off | C．take over | D．take in |
29-year-old Yicheng mayor named Zhou Senfeng was__________ by a great many netizens that he had copied someone else' papers.
| A．questioned | B．witnessed | C．envied | D．confirmed |
The news from Shanghai Expo garden yesterday said the main structure of Hubei museum has been_____________.
| A．completed | B．achieved | C．constructed | D．concluded |
To our great__________ , grandmother's illness proved not to be as serious as we had feared.
| A．anxiety | B．relief | C．view | D．judgement |
News about Hubei 2010 teachers' ___________ examination has been issued on the Internet.
| A．qualification | B．application | C．publication | D．certification |