The course books are ________ by four tapes, which are beneficial to beginners．

A．adapted

B．designed

C．accompanied

D．managed

While ________ music is just so-so, ________ story in this TV play is quite moving．

A．/; a

B．the; the

C．the;/

D．/; the

When I saw my teacher nodding ________ to me, I calmed down and went on with my performance．

A．encouragingly

B．amazingly

C．increasingly

D．accordingly

Teachers have to constantly update their knowledge in order to maintain their professional ________．

A．consequence

B．independence

C．competence

D．intelligence

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

________ Olympic torch has reportedly stayed alight throughout ________ varied extreme weather conditions in a German testing center．

A．不填; the

B．The; 不填

C．不填; an

D．The; a

The time he has devoted ________ the disabled is now considered ________ of great value．

A．to help; being

B．to helping; to be

C．to help; to be

D．helping; being