原句when are you go hiking 是对的.yakukoo说得对,一般人没这么说得.所以省略了going to .所以完整的句子是when are you going to go hiking.
因此这道题的答案是:are you going to.
原句when are you go hiking 是对的.yakukoo说得对,一般人没这么说得.所以省略了going to .所以完整的句子是when are you going to go hiking.
因此这道题的答案是:are you going to.