I tried to call on you last week but your dog simply not let me come through the gate.A.

问题补充：

I tried to call on you last week but your dog simply not let me come through the gate.

A. could

B. would

C. might

D. should

答案：

A. could

(答案→)B. would

C. might

D. should

解析：would和not连用，表“不肯，总是不”。