难度：★★ 考点：补全对话
根据对话内容，从对话后的选项中选出能填入空白处的最佳选项。选项中有一项为多余选项。
( )1. I'm sorry I can't follow you.
( )2. Would you mind my smoking here?
( )3. Hello. Could I speak to Mr. Smith?
( )4. Let's go to the park.
( )5. Thank you for carrying the heavy box for me.
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