sat 语法题used to challenge or abolish平行 还是used to challenge or to abolish平行?为什么我觉得是第二个,但是答案是第一个

sat 语法题used to challenge or abolish平行 还是used to challenge or to abolish平行?为什么我觉得是第二个,但是答案是第一个 SAT语法题,很难啊,高手解答Marie and Pierre Curie discovered radium but refused to patent the process they(used nor otherwise profiting)from the commercial exploitation of radium. (A) used nor otherwise profiting (B) had used nor otherwise di 13年10月的Sat语法题cockcroachs,like the birds,can feel the magnet _________________A Which is used by them to navigateB Which they used to navigate我选的A 感觉B 需要用 by which sat语法题ip 疑问是to improve和improving SAT语法题 SAT语法几道语法题 SAT语法句子改善题 一道SAT OC 语法题> SAT语法题一道Among the earliest telescopes were Galilean telescopes,modeled after the simple instruments built by Galileo,the first person （having used） telescopes to study the stars and planets.答案说要把括号里的改成 to have used sat语法, SAT语法. 新世纪的语法题 急There ________ only one international airport in Shanghai .A used to is B used to had C used to be D used to have 一道sat的语法题,解释 问2道SAT语法题! 一道sat上的语法题 第19题（sat语法） sat语法题 为什么选D啊 sat语法题 正解b 怎么解