问题
选择题
—It’s only ten minutes’ walk; I could have got there on foot.
— Yes. A taxi _______ not at all necessary.
A．was
B．had been
C．has been
D．is
答案
答案：A
考查时态。根据题中could have got there可知为对过去事情的推测，故用一般过去时态，选A。
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