问题
选择题
—Isn't it hard to drive downtown to work?
—Yes，that's why I________to work by train.
A．have been going
B．have gone
C．was going
D．will have gone
答案
答案：A
答案 A [坐火车去上班的动作发生在过去持续到现在并将持续下去，应用现在完成进行时。]
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