根据对话内容，从A到F选项中，选出能填入空白处的最佳选项，每个选项只使用一次，选项中有一项为多余项。

A. How long did you stay in the forest? B. What do you think of the people there? C. Who did you go there with? D. Where did you go? E. Where have you been? F. You need to take more thick clothes.

A: Hello, Mike. How was your vacation?

B: I really had a good time.

A:

B: I've been to a forest near my uncle's farm.

A:

B: I went there with my friends.

A: 

B: For 3 days. I expect to go there again.

A: Lucky you. I had to stay at home. But I'm planning to travel to Mount Changbai.

B: Oh, that's a good place. I went there three years ago.

A: Can you give some advice on my trip to Mount Changbai?

B:

A: OK, I'll do as you tell me.

B: They are friendly and you will enjoy yourself there.