【C14】
A．of
B．by
C．with
D．against
请帮忙给出正确答案和分析，谢谢！
【C14】A．toB．forC．withD．in
【C14】A．forB．inC．withD．on
Be _____ guard against pickpockets.A: onB: byC: withD: of
【C14】A．offB．onC．withD．for
【C3】A．InB．ByC．WithD．At
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