在线求指导：HaveyousentthatlHaveyousentthatletteroffyet?There'ssomethingimportantI'dliketoaddit.[]A.upB.toC./D.with

Question

在线求指导：Have you sent that l

Have you sent that letter off yet?There's something important I'd like to add _____ it.	[     ]
A.up B.to C./ D.with

Answer 1

B