He had to pause from time to time to wipe the sweat from his forehead,because the air-conditioning system __________.
A.broke in |
B.broke up |
C.broke out |
D.broke down |
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He had to pause from time to time to wipe the sweat from his forehead,because the air-conditioning system __________.
A.broke in |
B.broke up |
C.broke out |
D.broke down |
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