184题:
个人认为: 对与A中的 as 不论伴随还是原因, 它和E中的because意思真的很接近, 很难区分出差别(无论从伴随还是原因角度说都有道理). yet前要加:号, ETS给出了解释说不是必需的. 能区分出的可能只有时态了.就象ETS说的:In E, are slipping with since then is illogical, and were unable represents an ungrammatical tense shift.
下是ETS的回复:The explanation does contain an error; while a comma before "yet" might be added for emphasis, it is not required because, as you point out, "yet are slipping since then" is not an independent clause. The rest of the explanation does accurately describe the grammatical and rhetorical problems with option (E).
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