This machine __________ It has worked for years.
A．didn’t work
B．wasn’t working
C．doesn’t work
D．isn’t working
C
時(shí)態(tài)題。根據(jù)it has worked for years可知機(jī)器工作到了現(xiàn)在所以“不工作”用一般現(xiàn)在時(shí)描述現(xiàn)在的情況。
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