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：此题考查时态辨析。由于还在销售，就证明商店还没关门，C项用进行时态表将来。