_________,the train started.A.The signal given B.Give the signal C.The signal has given D.The

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_________,the train started.A.The signal given B.Give the signal C.The signal has given D.The

_________,the train started.A.The signal given B.Give the signal C.The signal has given D.The
_________,the train started.A.The signal given B.Give the signal C.The signal has given D.The

_________,the train started.A.The signal given B.Give the signal C.The signal has given D.The
A
你的句子是独立主格结构,做时间状语.
== WHEN the signal was given,the train started.

答案B是不是Given啊?

A. The signal given 为正确选项。
这是“名词+过去分词”结构,属于独立主格结构的一种,做状语,相当于一个时间状语从句After the signal was given....

A. The signal given