单项选择题


A．Care
B．Worry
C．Concern
D．Anxiety
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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．MoreoverB．ThusC．HoweverD．Furthermore
A．Moreover
B．Thus
C．However
D．Furthermore
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