"even as" is a transition used to imply simultaneity, and is usually used with parallel tenses (i.e., same tense in both parts of the parallel structure). 主句从句的时态要保持一致
here's an example: even as his income has increased, joe has continued to feel less and less satisfied with his life
(C) 实际上，伴随所表达的因果是一种自然而然的因果，例如：Jack kicked the post, feeling pain.
“感觉疼痛”是“杰克踢杆子”的自然而然的结果，所以“感觉疼痛”用了伴随状语来表达。但在本选项中，“实际上可以做温度计”显然不是“叫声随着温度而变化”的自然而然的结果，因此不能用伴随状语来表达。
as的问题，RON 说没错，”in that part of choice C, the main problem is the use of a past-tense verb ('was') to describe something that might hypothetically happen in the future!“
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note the elephant that gave rides to children at the Whipsnade Zoo was earning......as example