Rewrite these sentences by using because

IV. Rewrite these sentences by using because
1. He couldn’t meet you because of being busy.
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2. She went to bed early because of her sickness.
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3. Nobody can do this test because of its difficulty
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4. Two cars can’t pass each other because of the narrow road.
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5. We spent the whole day in the garden because of lovely weather
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6. He can’t go to school today because of illness.
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7. He broke the vase because of his carelessness.
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8. I went to bed early because of tiredness.
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9. He can’t go to school because of his broken leg.
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10. Tom is busy, so he can’t help you.
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