Because the shop , all the T-shirts are sold at half price.
A. has closed down
B. closed down
C. is closing down
D. had closed down
网友回答
A. has closed down
B. closed down
(答案→)C. is closing down
D. had closed down
解析：考查时态。根据后半句：T恤半价出售，说明这家店还没有关门，只是即将关门。故C正确，现在进行时表示将来时。