Which of the following is used when one fails to catch what the speaker has said? ( )
A.Excuse me. B.I'm sorry. C.Keep nodding. D.I beg your pardon.正确答案D
Which of the following is used when one fails to catch what the speaker has said? ( )
A.Excuse me. B.I'm sorry. C.Keep nodding. D.I beg your pardon.正确答案D