________ many times，I still didn't know how to operate the machine.
| A．Having taught | B．Having been taught | C．Being taught | D．Teaching |
China's exchanges and cooperation with other developing countries reached a new level. China's relations with other major countries grew through interaction.
| A．stiffly | B．steadily |
| C．virtually | D．entirely |
We should place emphasis on development and security, and develop nuclear energy on the base of security.
| A．equal | B．central |
| C．superior | D．maximum |
President Xi Jinping appeared at Saturday's state dinner hosted by the Dutch royal family in a traditional Chinese suit ,which displayed the leader's national pride and confidence in Chinese culture.
| A．capable | B．significant |
| C．formal | D．authentic |
ASEAN (东盟) foreign ministers are better engagement with the Chinese government when it comes to the various conflicts in the South Chinese Sea.
| A．doing without | B．calling off |
| C．putting forward | D．calling for |
The study of natural history is not something to be left to biologists. In fact, their capacity __________ the time they can spend away from their offices is very limited.
| A．in favour of | B．in search of |
| C．in terms of | D．in view of |