Coffee prices rose sharply Monday, posting their biggest one-day gain in almost three years, after a weekend cold snap in Brazil raised concern that there could be damage to the world's largest crop when at a time with supplies already tight.
that there could be damage to the world's largest crop when at a time with supplies
that the world's largest crop could be damaged at a time such as when supplies are
that the world's largest crop could be damaged at a time when supplies are
of the world's largest crop possibly being damaged at a time with supplies
of possibly damaging the world's largest crop at a time that supplies were
AB选项:固定搭配有误:at a time when 表将来;DE选项concern of此搭配有误,同时,being, damaging现在分词形式有问题;至于C选项的时态,表达一般的规律
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