While Clovis points are spear points whose faces have longitudinal grooves chipped into them, they have been found all over North America, and named for the New Mexico site where they have been first discovered in 1932.
语法 Sentence Correction-480
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正确的用户笔记
Leon111 2014-06-06 22:11:54
while不能替代even though
vivian_fordream 2015-08-03 18:44:01
have been discovered 错，因为discover不是可持续的动作
香蕉小姐 2015-05-03 15:50:47
前后转折关系错
凡糕君 2016-07-15 11:35:43
although，even though，while引导的是让步状语从句，需要跟主句有较弱的转折关系，任何没有转折关系的都是错误选项。
karenning 2016-07-06 23:50:32
while cannot replace even though/though
snow199511 2016-06-09 16:49:17
1. where they have been first discovered 2. while vs although
Sissi0527 2016-06-02 05:13:46
have been first discovered wrong tense..while不能代替although/even though..
kefirah 2015-10-05 16:42:32
while放在这里不make sense
Irene九月九加油 2015-07-23 23:30:51
whose face指代的是spear points。，and后面要是一个完整的句子。 have been discovered的时态用的也不对
hetatomato 2015-05-14 11:16:53
句子结构混乱；them，they指代不清；named 前缺were；后面完成时错误，应该用一般过去时；
HolmesY 2015-03-17 11:42:56
没有比较，语意不符，且时态错误
