of this room empty.A. Two-third areB. Two-thirds areC. Two-third isD. Two-thirds is

问题补充：

of this room empty.

A. Two-third, are

B. Two-thirds, are

C. Two-third, is

D. Two-thirds, is

答案：

A. Two-third, are

B. Two-thirds, are

C. Two-third, is

(答案→)D. Two-thirds, is

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