✨ คำตอบที่ดีที่สุด ✨
(1) ⑥ would
He [kept quiet for fear he would disturb his] brother.
※for fear (that)+S+V~ もしかしたら~しないかと恐れて
(2) ② might
I have found [a book that might be of great importance] to my life.
※of great(形容詞) importance(抽象名詞)=very(副詞) important(形容詞)
(3) ⑧ have
She [could have been Prime Minister if she hadn't decided] to leave politics.
(4) ④ long
I am [determined to reach my goal however long it takes].
※be determined to ~ ~することを固く決意している
(5) ⑧ that
[It is a pity that he could not] hold a concert. <形式主語>
参考にしてください。
You're welcome!😊
回答してくださってありがとうございました!
助かりました^_^