, they have been struggling against the snowstorm for ten hours.A. Up to nowB. By the time

发布时间：2020-08-16 12:14:29


    , they have been struggling against the snowstorm for ten hours.
A. Up to now
B. By the time
C. From then on
D. In the future

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(答案→)A. Up to now
B. By the time
C. From then on
D. In the future
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