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Which pair does NOT have the same meaning?
① Being tired, I took a nap instead of going out.
= Because I was tired, I took a nap instead of going out.
② Because I had guessed at the answers for most of the test, I didn't expect to get a high score.
= Having guessed at the answers for most of the test, I didn't expect to get a high score.
③ He listened to the radio, and laughed a lot.
= He listened to the radio, laughing a lot.
④ Not knowing what to say, I kept silent.
= If I didn’t know what to say, I kept silent.
⑤ Having forgotten to bring a pencil to the exam, I had to borrow one.
= Since I had forgotten to bring a pencil to the exam, I had to borrow one.