A scrub jay can remeber when it cached a particular piece of food in a particular place, researchers have discovered, and tend not to bother to recover a perishable treat if stored long enough to have rotted.
key: tends not to bother recovering a perishing treat
小菜我的问题是:我总感觉有一种平行是 can do and (can) do 这个到底有没有呢?
(所以我认为A 从这个角度看可以,但是if是错误的,因为如果有if的话,这里的主语就指的是 a scrub jay, 而不是那个food。)
还有一道:
206(GWD-21-Q29)
While studying the genetic makeup of corn, a new class of mutant genes was discovered by barbara McClintock, a discovery which led to greater understanding of cell differentiation.
key:Barbara McClintock discovered a new class of mutant genes, a dicovery that led
It seems likely that a number of astronomical phenomena, such as the formation of planetary nebulas, are caused by the interaction of two stars orbiting each other at close range.