A．frequentlyB．alwaysC．oftenD．rarely
A. frequently
B. always
C. often
D. rarely
查看答案
Some people argue that crime is mainly caused by ______.
A. discrimination
B. family disorganization
C. harmful social conditions
D. class exploitation
【C2】
A. introduce
B. trigger
C. summon
D. create
【C9】
A. abstracts
B. angles
C. aspects
D. assumptions
Which of the following is true about the present swine flu viruses？
A. The viruses can infect different species.
B. The genes of the viruses come from pigs.
C. The viruses mix genes from different species.
D. The genes of the viruses were made artificially.
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