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
整个句子都是过去式的,C选项的are难道不应该换成were吗?求大神帮忙解答一下
应该是指一种general idea吧 一种一直存在的道理
The usage of are (present tense) conveys that RIGHT NOW -- just a few days after prices rose this past Monday -- supplies ARE tight.
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