Combine the sentences

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Practice
Combine the sentences
1. Your mother can't sit up. She is very weak.
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2. We couldn't finish the test. It was so difficult.
3. They were very worried. They couldn't talk to each other.
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4. The children couldn't see the first part of the film. They came late.
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5. The little boy is not old enough. He can't dress himself.
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