In the past twenty years, many tall buildings have been built in our city. Look! This is a            .

A. 70-floor building
B. 70-floors building
C. 70-floor buildings
D. 70 floors building
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科目：初中英語 來源：競賽題 題型：單選題

In the past twenty years, many tall buildings have been built in our city. Look! This is a            .
[     ]
A. 70-floor building
B. 70-floors building
C. 70-floor buildings
D. 70 floors building

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