6. In Scotland, as in the rest of the United Kingdom, ______ schooling begins at age 5 and ends at age 16.  

A. compelling

B. forced

C. obliged

D. compulsory

7. We are ______ faced with the necessity to recognize that having more people implies a lower standard of living.

A. readily

B. smoothly

C. inevitably

D. deliberately

8. It has been estimated that the earth’s surface temperature has increased ______ one quarter to three quarters of a degree since 1850.  

A. to

B. by

C. at

D. with

9. During the conference the speaker tried to ______ his feelings concerning the urgency of a favorable decision.  

A. comply

B. impose

C. imply

D. convey

10. We managed to reach the top of the mountain, and half an hour later we began to ______.  

A. ascend

B. descend

C. decline

D. plunge

 6--10:  DCBDB