—How long has this bookstore been in business? — 1996.A. AfterB. InC. FromD. Since

问题补充：

—How long has this bookstore been in business?

— 1996.

A. After

B. In

C. From

D. Since

答案：

A. After

B. In

C. From

(答案→)D. Since

解析：考查时态。根据上句的时态现在完成时，说明下面所填时间状语必须能和现在完成时连用，选项中只有D项和现在完成时连用。Since自从。故D正确。