sat的一道题Chess players find that playing against a computer is helpful to improve their skills,even though no chess-playing computer has yet won a championship.选错的A:to improveB:theirC:even thoughD:wonE:No error我总感觉是Ebe helpful t

请问一道SAT中的语法改错题chess players find that playing against computer is helpful to improve their skills,even though no chess-playing computer has yet won a championship.为什么要把 to improve 改成 in improving呢? sat的一道题Chess players find that playing against a computer is helpful to improve their skills,even though no chess-playing computer has yet won a championship.选错的A:to improveB:theirC:even thoughD:wonE:No error我总感觉是Ebe helpful t 一道SAT 的题 一道SAT 的题 一道sat writing 的题 She has to study how famous chess players do it.She even dreams about chess.的翻译 SAT 的一道writing的题 sat 真题里的一道 writing 的题 一道sat的语法题,解释 一道sat上的语法题 一道sat第一套的IP题 一道SAT的数学题, 一道sat writing的题目 一道SAT OC 语法题> sat 的一道writing的题 帮忙解释一下 谢谢 问一道英语选择题,应该是非谓语方面的______ our seats,the players began the game of chess.A.Having taken B.After tookC.After having takenD.Taking我需要的不仅仅是答案,我需要理由.想了很久,感觉都不对,是独立主 SAT IE题目提问～?Chess players find that playing against a computer is helpful to improve(A) their(B) skills, even though(C) no chess-playing computer has yet won(D) a championship. No error (E)我还是不懂为什么不可以是is helpful to i be helpful 的用法Chess players find that playing against a computer is helpful to improve their skills.这句话中 to improve 错在何处?是不是应改为to improving?谢Chess players find that playing against a computer is helpful to improve