根据对话内容，从方框中选择恰当的选项补全对话，其中有两项多余。

A：Hi， Mike．What are you going to do for your summer holidays?

B：．What about you?

A：I'm going camping with some friends．

B：

A：Not this year We are going to the forest．

B：

A：About a month，I think．Would you like to come with us?

B：

A：That doesn't matter．I have an extra(额外的) one and you can use it．

B：Thanks very much，Steve．

A：

B：Only once，when l was very young．

A：Well，I'm sure we'll have a great time．

A．Have you camped before? B．It's a very long way to the forest． C．I'm not sure vet． D．Really? Are you going to the beach? E．I'd love to，but I don't have a tent． F．How long are you going to stay? G．I'm afraid I can't．I'm busy．