I pay Tracy a visit but I am not sure whether I will have time this Sunday. A. shouldB.

问题补充：

I pay Tracy a visit, but I am not sure whether I will have time this Sunday.

A. should

B. might

C. would

D. could

答案：

(答案→)A. should

B. might

C. would

D. could

解析：should表示一种责任或义务，“应该”。