This time, he __________ three scenarios, nuclear war, global warming and genetically engineered viruses.[音频]（来源：BBC News）
A. was ignorant of
B. paid special attention to
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Don't _____ from me.[音频]（来源：歌曲《Amazing》）
A. take
B. depart
...if you want to "slow an epidemic, _____ hand-washing."[音频]（来源：VOA）
A. forget
B. concentrate on
Which of the following molecular cytoplasmic regions contains ITAM?
A. CD2
B. CD3
CTLA-4
D. CD21
E. CD8
Which of the following cytokines is a Th1 cytokine?
A. IL-2
B. IL-3
C. IL-4
D. IL-5
E. IL-6
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