Question

そよ

答えは、Cです
解説お願いします

Growing at a speed of more than 100,000 new residents a year, Canada's
largest city keeps getting larger But the continued population increase
hasnt changed Toronto's character. ( 1 ) long known for welcoming a
1arge variety of cultures and people, the city where more than 140 languages
are spoken, has also made considerable investments in public transportation

and technology making the city even more (2)attractive to newcomers and
Silicon Valley* talent.

1、空所 ( 1 ) に補う語句として最も適当なものを(一(D)のうちから一つ選び
なさい。
(4) Had been
(B) Has been
(C) Having been
(D) Was been

Answer 1

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さ や

完了の分詞構文の形です
having been long known for～
長い間ずっと～で知られてきたので、
という意味です

他の選択肢の主語や接続詞のない形では正しい英文の形になりません

そよ

回答ありがとうございます！
そうなんですね！