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TWO TONS OF COAL ______ REQUIRED.A. IS B. ARE C. H...
TWO TONS OF COAL ______ REQUIRED.A. IS B. ARE C. HAVE BEEN D. WERE
33 DE TRAC NGHIEM CUA MAI LAN HUONG
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25. Two tons of coal ______ required.
a. is b. are c. have been d. were
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25.
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33 DE TRAC NGHIEM CUA MAI LAN HUONG