将下列句子改成一般疑问句和否定句。
1、She has some nice pictures.
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2、There are some stars in the sky.
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3、There is some orange juice in the bottle.
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4、Mike and l have some new stamps.
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5、They gave me some postcards.
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6、I would like some cake.
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7、There are some maps on the blackboard.
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8、I can show them some VCDs.
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9、I have some brothers and sisters.
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10、We are going to write some letters to our penfriends.
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