已知：

求证：

证明：

问答句配对,在右栏中找出与左栏相对应的答句。

①Hello, my name is Daming. ____      A. My telephone number is 56778843.

② How old are you? ____               B. P-E-N-C-I-L.

③What's your telephone number? ____      C. Thank you!

④Can you help me? ____          D. It's fifteen

⑤Sit down, please. ____           E. It's black and white

⑥How do you spell "pencil"? ____     F. Hi, Tony. Nice to meet you.

⑦This is my friend, Tony. ____        G. Football.

⑧What's eleven and four? ____     H. I'm twelve 

⑨What color is it? ____            I. Hello, I am Tom!

⑩What's your favourite sport? ____     J. Yes, of course.