The traditional goal of science is to discover how things are, not how they ought _____.
| A．to be | B．be | C．have been | D．To |
The film 2012 has filled some people with ________ fear that ________ man will meet terminal disasters in 2012.
| A．a；/ | B．a；the | C．/；the | D．the；/ |
－Hello, is that John?
－__________ a moment. He is coming.
| A．Hold on | B．Hold up | C．Hold on to | D．Waiting. |
If our parents do everything for us children, we will not learn to depend on ________.
| A．themselves | B．them | C．us | D．ourselves |
This book is written by my sister, _________ is working for CCTV.
| A．she | B．that | C．whom | D．who |
Ladies and gentlemen, please fasten your seat belts. The plane__________.
| A．takes off | B．is taking off | C．has taken off | D．took off |