1.These are my friends.(改为单数句)
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2.Sam is tall.Amy is taller.(合并成一个句子)
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3.It wasn`t fat then . .(同义句)
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4.He was naughty then . (变为一般疑问句,并否定回答,再用cute回答。)
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5.This is a book about London.(变为一般疑问句,并否定回答)
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6.Beijing is in the north of China .(对划线部分提问)
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