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

 Mistakes don’t just happen; they occur for a reason. Find out the reason, and then making the mistake becomes ______.
A. favorable        B. precious          C. essential      D. worthwhile

－It’s necessary to limit the speed of electric bikes.

－Yes, most riders of electric bikes in China        40-50 kilometers per hour often ignore red lights,        the risk of traffic accidents.

 A. reaching; increase                          B. reach; increase

C. to reach; to increase                             D. reaching; increasing

—Well，I do think the ipod is smart, convenient and intelligent．

—________．

A．So it is                                         B．So is it

C．So does it                                         D．So it does

— Did you hear about Zhang Lili who saved the kids from being run over by a school bus?

— Yes. What do you think most people _____ if they were in a similar situation?

　 A. will do　 　　　 　　　　　　　　　　　　　　　　　　　　　 B. will have done.　 　　

C. would do D. would have done

— How do you think I can make up with Johnson?

— Set aside ______ you disagree and try to find ______ you have in common.

　 A. what; what　　 B. where; what　　 C. what; which　 　 D. where; which