Why should anti-vires software be updated at least once a week？
A. Because the newly published anti-vires software is more expensive.
Because the previous (先前的) anti-vires software cannot work any longer.
C. Because the inventors of viruses have suggested this idea.
D. Because computer viruses are always developing.
【B11】
A. fast
B. faster
C. fastest
D. lastly
【B12】
A. in
B. on
C. under
D. between
Why does the man want to visit New Mexico？
A. To study there.
B. To take a vacation.
C. To see his family.
D. To learn skiing.
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