阅读下面短文，从每题所给的A、B、C、D四个选项中选出最佳选项。

Mike is a 12-year-old boy from America. He is a student at Sunshine School in Beijing. Mike always helps everyone, so he is very welcome in his school.

Now Mike meets a boy in the playground.

"Hello, I'm Mike. ____▲____"

"Yes, I'm a new student in Class 5 Grade 7. My name is Lin Dong," the boy says.

"You look not happy. What's wrong (怎么了)?" says Mike.

Lin Dong says,"I lost (丢失) my English book. "

"I have an English book. It s in my bag. I can share (分享) it with you. And I can help you with your English too," Mike says.

"That's great! Thank you very much! You don't know me, but you help me so much," Lin Dong says.

"I'm very happy to help you!" Mike says.