【单选题】Last year his parents went to the west on business and he went to see his grandmother ______.
A．for the time being
B．over and over again
C．once upon a time
D．at regular intervals
【单选题】Last year his parents went to the west on business and he went to see his grandmother ______.
A．for the time being
B．over and over again
C．once upon a time
D．at regular intervals
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