23.Crisis would be the right term to describe the __ in many animal species.
A.abolition
B.restriction
C.descent
D.decline
24.Up until that time, his interest had focused almost__ on fully mastering the skills and techniques of his craft.
A.restrictively
B.radically
C.inclusively
D.exclusively
25.In the___ of human life the honors and rewards fall to those who show their good qualities in action.
A.ring
B.terrace
C.arena
D.ground
26.On January 1st many people make a New Year
A.intention
B.determination
C.dedication
D.resolution
27.Bill assured his boss that he would __ all his energies in doing this new job.
A.call forth
B.call at
C.call on
D.call off
28.We had a __ lesson in ideological education yesterday and were deeply impressed.
A.profound
B.deep
C.extreme
D.shallow
29.Despite technical progress, some food production is still completely __ on weather.
A.reliable
B.dependable
C.dependent
D.inseparable
30.His speech rambled for half an hour, but the___ of what he had said was that too many people has too little money.
A.aim
B.purpose
C.essence
D.content