President Obama and visiting Chinese president Xi Jinping held talks on a private property, _________ the first official meeting since the two countries changed their leadership.
| A．marking | B．to mark | C．marked | D．to be marked |
The retired professor, _____ in his new book in the past three years, hasn’t realized the decline in his health．
| A．involved | B．being involved |
| C．having involved | D．to be involved |
With the final exams coming, Mark, the top student in our class, is not worried about Chinese, and _________ English．
| A．still more | B．at least |
| C．least of all | D．better than |
It puzzles the scientists _____ some mammals produce their young _____ others lay eggs．
| A．that; while | B．what; while | C．that; as | D．what; as |
Many Internet users make _____ most of the half-price promotion and it is _____ good opportunity for online shopkeepers to get their names known．
| A．a; the | B．/; the | C．the; / | D．the; a |
After she made herself up, she herself in the mirror.
| A．admired | B．enjoyed | C．found | D．Showed |