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This dream clearly shows your nervousness and anxiety about this exam.
I'm afraid I can't arrive on time.
I'm afraid this exam is very important to you.
Actually, it's nothing. As long as you are fully prepared, you can have an answer.
There is nothing to worry about. Relax, take a deep breath and then relax.
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The content of dreams needs to be discussed in detail. You can knock me at Baidu HI if you are interested.
Let me enlighten you.