Because the shop all the T-shirts are sold at half price. A. has closed downB. closed d

问题补充：

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

答案：

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。