题目

–How much difficulty has the team had ________ this problem?- _________. The members are all good problem solvers.A. to solve; Nothing B. solving; None C. to solve; None D. solving; Nothing 答案：【答案】B【解析】句意:——解决这个问题这个团队有多少困难呢？——没有困难，队员们都是解决问题的高手。本题结合代词考查非谓语动词。have difficulty ( in) doing sth.做某事有困难；又根据none用来回答 how many 或 how much 可知选 B 项。 直接写出得数．300×80= 90×500= 340×20= 700×40= 200×36= 20×130= 120×20= 240×40= 110×40= 30×230= 100×56= 20×220=