Question

—Is there a letter for me?
—Yes,        came for you this morning.

A．that

B．it

C．one

D．the letter

Answer 1

C

考查指示代词。“有我的信吗？”“是的，今早来了一封给你的信。”这里泛指“一封信”，用one；it表示特指；that指代不可数名词。故选C。