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What a wonder! they've finished ______30% of the task within one week A no more than B no less than C not more than D much less than
解题思路: 如下
解题过程:
选B。句意是:太神奇了!他们在一周内已经完成了30% 的工作量。
 1. no more than 的意思是“仅仅”“只有”“最多不超过”,强调少。如:
  This test takes no more than thirty minutes. 这个测验只要30分钟。
  The pub was no more than half full. 该酒吧的上座率最多不超过五成。
  For thirty years, he had done no more than he (had) needed to. 30年来,他只干了他需要干的工作。
  2. not more than 为 more than (多于)的否定式,其意为“不多于”“不超过”。如:
  Not more than 10 guests came to her birthday party. 来参加她的生日宴会的客人不超过十人。
  比较:
  She has no more than three hats. 她只有3顶帽子。(太少了)
  She has not more than three hats. 她至多有3顶帽子。(也许不到3顶帽子)
  I have no more than five yuan in my pocket. 我口袋里的钱最多不过5元。(言其少)
  I have not more than five yuan in my pocket. 我口袋里的钱不多于5元。(也许不到5元)
3. no less than 的意思是“多达”“有……之多”,强调多,与 no more than 意思相反。如:
  He made no less than £500. 他赚了多达500英镑的钱。
  He paid no less than $10,000 for it. 他为此付了一万多美元。
  No less than 50 people offered to buy it. 至少有50个人提出要买它。
4.much less than ,其意为“比...少得多”,也是强调少。
题干部分的What a wonder!表示惊讶语气,所以应该选B。
最终答案:略