[单项选择]
C
根据下面短文回答下列问题。
When you want to make telephone calls to English people, you should know that Chinese and English people start a telephone conversation in different ways. For example, if Mr. Smith wants Mr. Liu, his Chinese friend, to answer the phone, he does not say, "Please ask Mr. Liu to answer the call." but "May I speak to Mr. Liu, please " If he wants to know who is answering the call, he asks, "Who is that " or "Is that Mr. Liu speaking " In this case, he never says, "Who are you " If Mr. Smith wants to let the other person know his name on the telephone, he says, "This is Mr. Smith speaking." He will not say, "I’m Mr. Smith./
If he wants to tell who he is on the phone, he says, "______’
A. This is Mr. Smith speaking
B. That’s Mr. Smith
C. I’m Mr. Smith