OG12,25题!!

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OG12

21.原句是Neuroscientists, having amassed a wealth of
knowledge over the past twenty years about the brain
and its development from birth to adulthood, are now
drawing solid conclusions about how the human brain
grows and how babies acquire language.
正确选项为A，原句正确。
其中E选项是Neuroscientists have amassed, over the past
twenty years, a wealth of knowledge about the
brain and its development from birth to
adulthood,
解释E的错误是“Like D, this sentence attempts to attach a
present-tense descriptor to a present-perfect
clause.”

然而25题修改后的句子是Using accounts of various ancient writers,
scholars have painted a sketchy picture of the activities of an
all-female cult that, perhaps as early as the sixth
century B.C., worshipped a goddess known in Latin as
Bona Dea, “the good goddess.”
这样不是又犯了用present-tense 修饰present-perfect句子了吗？

请求解答~

LEDGIRL

有SB BASE ON ，，，，，感觉BASE 不是人发出主要动作呢

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刚刚看到，感谢楼上！

lsssl

我认为21题是amass和draw的时间是有先后顺序的，先amass，然后now draw，所以不能用现在发生的事来补充描述已经发生的事
25题中paint和use其实是同时发生的，所以可以来用其中一件来补充描述另外一件事，至于为什么用using而不是having used，我也说不清楚，也许use这个词比较特殊，我没有查到having used做状语的句子

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base on我查到的例句里没有指人的，可能就是不这么用吧

aliceloo

为什么不可以理解scholars based sth on accounts of various ancient writers呢？

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楼上这么一讲觉得明白了许多~
语法还是要为意思服务

12365147254liu

可能是句意改了吧。。a没错，用了现在的时态，e没必要改成过去吧 而且有个逗号，让drawing 有修饰adult的可能 所以选a
25也是意思。a项base on的逻辑主语是那个scholars 吧，意思不对啊。用using修饰学者没问题 e

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没人回答,只有再顶...

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自己顶一下~