問題詳情

21. Taipei 101 _________ the tallest building in the world in 2004. The record was broken by Dubai Burj Khalifa in 2007.
(A) used to be
(B) was used to be
(C) is used to being
(D) is used to be

參考答案

答案：A
難度：計算中-1
書單：沒有書單，新增

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