一Excuse me，could you tell me where I can post a letter?

—_______．Turn left．There is a post office on the Fifth Road．

A．Sure             B．Sorry             C．Sounds nice         D．Good idea

1、A  考查交际用语。根据问句“你能告诉我我该去哪儿寄信吗?”可判断应用sure“当然可以”。故选A。