9. What is NOT true about 1 WTC?
(A) It is a very solid and sturdy building.
(B) The construction cost was extremely high.
(C) It is worthless in the eyes of many New Yorkers.
(D) The construction of it took an unprecedented step.

The result of all this time, planning, and effort is one of the safest and strongest towers ever built. In the end, the estimated price tag for the building was US$3.9 billion. However, for many New Yorkers, 主詞(seeing a new tower rise up 〔where the twin towers once stood〕) is something (that) no one can put a price on.
最後一句的意思應是指「看到1WTC佇立在雙子星大樓曾存在的位置上」，就算花這麼大筆錢也是很值得的。
9. What is NOT true about 1 WTC?
(A) It is a very solid(堅硬的)and sturdy(結實的)building.
(B) The construction cost was extremely high.(花費非常高)
(C) It is worthless in the eyes of many New Yorkers.
worthless 毫無價值的、不值錢的(相似詞：valueless沒有價值的、不值錢的)
→應改成"priceless"珍貴的、無價的或"invaluable"非常貴重的、無價的)
(D) The construction of it took an unprecedented(空前的 、史無前例的) step.