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