Combine these following sentences using the words given in the brackets

X. Combine these following sentences using the words given in the brackets:
1.Ba often gets good grades. He always studies hard. ( Because )
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2. You should be careful with the food you eat. You will have an allery. (Or )
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3.She had to cook dinner herself. Lan’s mother was home late yesterday. (So)
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4.To stay healthy, we should eat more vegetables. We should reduce high-fat food. ( And )
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5. We talk and sing for the elderly people. It makes them happy (because)
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