The lead in pertrol produces a poisonous gas which often – in busy streets surrounded by high buildings. collecting collects collect collected giả

0 bình luận về “The lead in pertrol produces a poisonous gas which often – in busy streets surrounded by high buildings. collecting collects collect collected giả”

1. →collected

   – đây là mệnh đề quan hệ dạng rút gọn bị động V-pp ( which is often collected⇒which often collected)

   – dấu hiệu: “by high buildings“

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