Read and write．（把下列句子变为一般疑问句，并作肯定和否定回答.）

1.1 was fat.

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2.They were young.

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3.He was short.

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4.She was cute.

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摇枕制成鱼腹型有三个好处，其中之一是，能使摇枕基本上形成一个（）梁，能节约材料。