It is desirable to （） the chemicals before the plant is seriously damaged.

单项选择题Thereisagrowingrecognitionthatweshouldabolishracial（）.

A. segregation  
B. separation  
C. integration  
D. evaporation

单项选择题HefeltproudtoproclaimthatheknewonlyEnglishandsomehow（）ofhisnativeculture.

A. contemporary  
B. temporary  
C. contemptuous  
D. contemptible