As the supermark allthe goods are sold at half price.A. has closed downB. is closing down

问题补充：

As the supermark, allthe goods are sold at half price.

A. has closed down

B. is closing down

C. closed down

D. had closed down

答案：

A. has closed down

(答案→)B. is closing down

C. closed down

D. had closed down

解析：考查时态。依据题意用进行时表将来。