Due to the volcano eruptions in the Republic of Iceland, all the flights are delayed or ca

发布时间：2020-08-16 08:14:44


Due to the volcano eruptions in the Republic of Iceland, all the flights are delayed or cancelled, so the conference has to be     .
A. put off
B. put through
C. put away
D. put on

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(答案→)A. put off
B. put through
C. put away
D. put on
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