阅读下面材料,从每题所给的A、B、C、D四个选项中,选出一个最佳选项。I'm Linda. In my home, there's a black and white thing. We call it Xiaodu. When you say " Xiaodu, Xiaodu", it says to you,"I'm here!" When you say" Good morning!" it says," Good morning!" to you.
In the morning, it is my clock. When it's 7:00, it tells me the time.
For my mom, Xiaodu is a library. It reads books to her every day.
My brother is 3 years old. He often asks Xiaodu for help," What's a telephone?"" What's a tape player?"… For him, Xiaodu is a dictionary.
Xiaodu is our good friend. We love it. Oh, where is it? It's on the TV set now.