(Choose the best answer) Ha Long Bay, __KNOWN AS___ one of new seven wonders of the world, consists of 1,969 big and small islands. Q: vì sao điền KNOWN AS mà không phải THAT KNOWN AS ạ?

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`-` MĐ quan hệ rút gọn

`@` which/who/ whom... + tobe + Vp2 `->` Vp2 

`+` Trong câu mđ quan hệ không xác định, that không dùng sau dấu phẩy

`+` Thiếu tobe (is/are)

`@` Which is known as `=` known as