8. Which of the following did NOT pose challenges to the construction of 1 WTC?
(A) The preparatory cleaning.
(B) The shortage of budget
(C) The gigantic heavy parts
(D) The underground transportation
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統計: A(30), B(260), C(63), D(51), E(0) #3170319
統計: A(30), B(260), C(63), D(51), E(0) #3170319