Which of the following is NOT well understood by biologists?
A.Differences in species richness within a temperate or a tropical region
B.Differences in species richness between temperate and tropical regions
C.European butterfly habitats
D. Comparisons of behavior patterns of butterflies and certain animal groups

 Butterflies are a good example for communicating information about conservation issues because they ___________.
 
A.are viewed positively by people     
B.are found mainly in temperate climates
C.have been given scientific names   
D.are simple in structure

(9) 
A.advised                   
B.urged                      
C.suggested                
D.whispered

(7) 
A.mentioning             
B.telling                      
C.talking                    
D.relating

 I’m quite happy to take part in the charity organizations.
A.I don’t mind to take part in the charity organizations.
B.I don’t mind to taking part in the charity organizations.
C.I don’t mind to be taking part in the charity organizations.
D.I don’t mind taking part in the charity organizations.

_______(8)
A.later
B.after
C.ago
D.now

________(3)
A.because of
B.as
C.although
D.but

_______(4)
A.eating
B.doing
C.feeding
D.watching

_______(2)
A.economy
B.politics
C.history
D.geography

George is a better mechanic than Arthur.
A.Arthur is worse than George at being a mechanic.
B. Arthur is not better mechanic than George.
C. Arthur is not such a good mechanic as George.
D. Arthur is not better than George at being a mechanic.