Q13:

Like the grassy fields and old pastures that the upland sandpiper（一种鸟） needs for feeding and nesting when it returns in May after wintering in the Argentine Pampas, the sandpipers vanishing in the northeastern United States is a result of residential and industrial development and of changes in farming practices.

1. the sandpipers vanishing in the northeastern United States is a result of residential and industrial development and of changes in
2. the bird itself is vanishing in the northeastern United States as a result of residential and industrial development and of changes in that the birds themselves are vanishing in the northeastern LACE w:st="on">United StatesLACE> is due to residential and industrial development and changes to
3. in the northeastern LACE w:st="on">United StatesLACE>, sandpipers’ vanishing is due to residential and industrial development and to changes in
4. in the northeastern LACE w:st="on">United StatesLACE>, the sandpipers’ vanishing, a result of residential and industrial development and changing

答案B。

请问句中“Like..."这个分句做什么成分。这句跟后面鸟消失有什么关系。谢谢。

用bird itself 和grassy fields and old pastures相比较，说明两样东西都消失了。

不过我觉得此题难以琢磨。

比较状语从句。

跟这种鸟赖以生存的草场一样，这种鸟由于人类定居， 工业发展和农业劳作的改变而正在灭绝。