问题
单项选择题
______, I picked up the phone and rang my sister in AustraliA．
A．Off impulse
B．On guard
C．Off guard
D．On impulse
答案
参考答案：D
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______, I picked up the phone and rang my sister in AustraliA．
A．Off impulse
B．On guard
C．Off guard
D．On impulse
参考答案：D