Although __________ to be the best in a recent science competition, the students remain hard-working.
| A．judged | B．judging |
| C．judge | D．having judged |
Teachers have to constantly update their knowledge in order to maintain their professional ________．
| A．consequence | B．independence |
| C．competence | D．intelligence |
—China is developing rapidly.
—Yes, to make our country more prosperous, we should firmly the principle of scientific development.
| A．contribute to | B．subscribe to | C．stick to | D．turn to |
Saving and recycling are long-term projects _______ determination matters a great deal.
| A．that | B．which | C．whose | D．where |
Jack wasn’t saying anything，but the teacher smiled at him ________he had done something very clever．
| A．as if | B．in case |
| C．while | D．though |
US President Barack Obama ________ a national speech at the 10th anniversary of 9/11 terror attacks．
| A．addressed | B．delivered |
| C．spoke | D．recited |