大全174

[sunsnow0422]

174.Believed to originate from a small area on their foreheads, elephants emit low-frequency sounds that may be used as a secret language to communicate with other members of the herd.

(A) Believed to originate from a small area on their foreheads, elephants emit low-frequency sounds that may be used

(B) Elephants emit low-frequency sounds that are believed to originate from a small area on their foreheads, and they may use this

(C) Elephants emit low-frequency sounds, believed to originate from a small area on their foreheads, that they may use

(D) Originating, it is believed, from a small area on their foreheads; elephants emit low-frequency sounds they may use

(E) Originating, it is believed, from a small area on their foreheads, low-frequency sounds are emitted by elephants that may be used

答案是c
請問believed這個分詞 如果用在像c 裡面那它是當關係代名詞子句的省略型
還是是修飾主詞elephants

另外 請問 什麼時候關代省掉會導致句意不清 什麼時候加了又變成不簡傑

謝謝

[christina]

believed to originate from a small area on their foreheads是插入句用來補充說明sounds,不是修飾elephants(選項A的句型才是,但句意脫節了)