Only when __________________ permission _______________ allowed to enter the lab.
| A．a teacher has given; are the students | B．has a teacher given; are the students. |
| C．has a teacher given; the students are | D．a teacher has given; the students are |
Jogging every morning is ________ good habit. Stick to it, and you'll make ________ great progress.
| A．a; / | B．a; a |
| C．the; a | D．/; / |
At the meeting the chairman appealed to us to take ______ full advantage of the chance of hosting the coming YOG to create ________ better Nanjing.
| A．a; a | B．the; / |
| C．/; / | D．/; a |
Music is ________ universal language and it is one of ________ ways to learn about another culture.
| A．the; the | B．a; / |
| C．the; / | D．a; the |
The police managed to gain ________ through an upstairs window.
| A．approach | B．way |
| C．access | D．passage |
Finding information in today's world is easy. The ________ is how you can tell if the information you get is useful or not.
| A．knowledge | B．ability |
| C．competition | D．challenge |