连词成句，注意所给的标点符号。

1. Think, I, pencil, it, his, is, (.)

     ____________________________________

2. know, you, do, how, him, (?)

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3. boy, friend, the, your, is, (?)

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4. not, it, this, gold, ring, my, (.)

    _____________________________________

5. in, the, that, your, and, lost, found, case, key, is, (?)

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惩罚就是通过呈现一个厌恶刺激以抑制机体的某些不良行为。