02 10 / 03 10 两道语法 请教

zhengzheng1026UID: 168914

02 10 35
Orchid seeds take (up to) eighteen months to mature (before they) sprout ,and the young plants (may need )another two years to( reach at) the flowing stage.
答案是d 请问A take up to 在这里是什么意思？花了多少时间做什么 为什么不直接用take?>>Orchid seeds take eighteen months to mature

03 10 17
Anyone with absolute or perfect pitch (are) able to identify by ear (any) note at (some) standard pitch or to (sing) a specified note at will.
答案是A  请问b >>by earing any note (which is)……..  ear 在这里是个动词？否则 (any) note at (some) standard pitch or to (sing) a specified note at will 是个什么结构？？

azleaUID: 192456

up to:(美国传统字典)as long as
eg. allowed up to two hours to finish the test. 允许有两个小时来完成考试

by ear是作identify的状语吧，整个句子主干是anyone are able to identify any note or to sing a note

azleaUID: 192456

分特，：（变成了:(了

zhengzheng1026UID: 168914

有点明白了　　感谢楼上的　　by ear 还真活跃啊　随便插个地方　　把偶搞晕掉了