题目内容
— Look! Everything here is under construction.
— Oh, it has the museum once_________for exhibitng art works been pulled down,too.
— Oh, it has the museum once_________for exhibitng art works been pulled down,too.
[ ]
A. being built
B. been built
C. having been built
D. built
B. been built
C. having been built
D. built
D
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