13. GWD31-Q13
Dolphins lack vocal cords, nevertheless creating sounds: a complicated system of whistles, Squeaks, moans, trills, and clicks are produced by sphincter muscles inside the blowhole
1) nevertheless creating sounds: a complicated system of whistles, squeaks,
moans, trills, and clicks are produced by
2) [h1] nevertheless creating sounds: they produce a complicated system of whistles,
squeaks, moans, trills, and clicks with
3）but they do create sounds, producing a complicated system of whistles, squeaks, moans, trills, and clicks with [h2]
4）but they do create sounds, a complicated system of whistles, squeaks, moans, trills, and clicks being produced[h3]
[h1]are错；冒號後方大多出現名詞或名詞片語作補充用,若形成子句應該用分號.
[h2]they do create sounds 的語氣是較強烈。
By +n. 施动者。
BY用来描述一个行为的细节,比如I TOOK THE KNIFE BY TACKING ITS BLADE.
WITH用来强调工具.比如I TOOK THE KNIFE WITH MY HAND.
with修饰的是produce,
with也有可能修饰它紧跟的词.解释前面的名词。
Unlike humans, dolphins lack vocal cords, but they do use a complicated system of whistles, squeaks, moans, trills and clicks produced by sphincter muscles within the blow hole.
分词短语无逻辑主语，又不是伴随结果。错。
倾向于C,不过每个看着都不爽
Dolphins lack vocal cords, nevertheless creating sounds: a complicated system of whistles, Squeaks, moans, trills, and clicks are produced by sphincter muscles inside the blowhole.
A: nevertheless creating sounds: a complicated system of whistles, squeaks, moans, trills, and clicks are produced by
B: nevertheless creating sounds: they produce a complicated system of whistles, squeaks, moans, trills, and clicks with
C: but they do create sounds, producing a complicated system of whistles, squeaks, moans, trills, and clicks with
D: but they do create sounds, a complicated system of whistles, squeaks, moans, trills, and clicks being produced
E: but nevertheless creating sounds: a complicated system of whistles, squeaks, moans, trills, and clicks produced by
觉得是3)
5)but nevertheless creating sounds错，but是连词，要跟句子，即使理解成主语省略也不对，GMAT有一类错误是but doing……
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