从方框中的选项中选出合适的句子补全对话。(填序号)

A. What's the good news? B. First, you should speak English as often as you can. C. How did you do that? D. Finally, you should do a lot of exercises. E. That is Very hard.

A: Mary, you look very happy.

B: I got a full mark in my English test.

A: That's great! I always have trouble with my English.

B: Well.

A: I'm too shy to speak English in front of others.

B: But it will help you a lot. Second, you should try to remember some sentences.

A:

B: Yes, it is hard in the beginning. But when you get used to it, it becomes easy. I believe you will do better in English.

A: Thanks for your advice.

B: You're welcome.