补全对话; （共5分,每空1分）

在对话空白处填上适当的话语（话语可以是句子、短语或词），使对话完整、正确。

(D---Dick, J---John)

D: Hello! May I ____小题1:______John, please?

J: This is John speaking. _______小题2:________?

D: It’s Dick.

J: Hi, Dick. Where are you?

D: I’m at home and looking after my mother.

J: ________小题3:_______?

D: She’s ill. She has caught a bad cold.

J: ________小题4:________. Can I help you?

D: Yes, thank you. I hear a New English-Chinese Dictionary is on sale.

Would you mind going there and getting one for me?

J: I’ll be ______小题5:______ to. I’ll go right now.

D: Thank you very much. Bye-bye.

J: Bye-bye.

系统设计包括多项内容，下述( )是系统设计最基础性的工作。

A．代码设计

B．屏幕设计

C．输入设计

D．输出设计