____in to use in 2000,the hotline was meant for residents re
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  • put,

    因为这是省略了主语和谓语的结构.要省略就要主谓都省略,然后充当状语.

    (the hotline was put,……)

    如:

    Tired,he went to bed.累了,他去睡觉了.

    这里原来的句子是:He was tired,so he went to bed.

    省略前面的主谓,将句子合起来,让前面的tired做状语补充说明原因.如果不要省略就都不省.如果要省就要全部省略.

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