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：由all the T-shirts are sold at half price可知，这家商店还没有关闭，但准备将要关闭，所以选C，用现在进行时表示最近的打算。