一道SAT语法题目When boarding a train,one should stand to the side and allow other travelers to disembark before (you attempt to enter).答案是attempting to enter,为什么原句有错?那又为什么不能改成you enter?

sat语法2题目. SAT语法题目一道In the primitive days when bathrooms and indoor plumbing did not (yet) exist,people would usually (have dug) enormous holes in their yards. 一道SAT OC 语法题> 一道sat writing的题目 一道sat的语法题,解释 一道sat上的语法题 一道sat语法为什么错了 sat 的一道writing的题目 求高手解答 SAT一道IP题目 sat语法, SAT语法. 一道SAT语法题.B选项怎么改? sat语法一道.c错在哪?e更好为何 sat语法.这题求详解.还有这一类型的题目. 一道SAT语法题目When boarding a train,one should stand to the side and allow other travelers to disembark before (you attempt to enter).答案是attempting to enter,为什么原句有错?那又为什么不能改成you enter? 着急求助一道SAT OG5 看不懂题目的意思啊 SAT语法一道题Maya Madera (proudly) wore (his sister's invention),a watch for winter campers (that flashes the temperature in) lighted numerals and sends out a loud alarm when (pressing a button)括号里哪个部分错了. 一道SAT语法题提干When chronological order is followed too mechanically,they are obscuringrather than clarifying important relationships.(E) If you follow a too mechanical chronological order,it obscures rather thanclarifies important relations