单项选择题


A．Instantly
B．Immediately
C．Occasionally
D．Subsequently
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单项选择题
A．keepB．keepingC．have keptD．kept
A．keep
B．keeping
C．have kept
D．kept
单项选择题
A．toB．againstC．forD．by
A．to
B．against
C．for
D．by
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