连词成句。

1. fun, let's, some, have (.)

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2. in, is, what, this, living room (?)

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3. couch, is, this, a, not (.)

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4. aren't, watching, they, TV, now (.)

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每对矫直辊之间的压力应沿着钢材的前进方向逐渐减小。