问题描述：
"Light travels faster than sound,"our teacher told us.(转换为间接引语丛句）
“You are like big brothers or sisters to them .”they said to us .(同上）
Don't be angry with your son.I think he can do better next time.(改同义句）
“You are like big brothers or sisters to them .”they said to us .(同上）
Don't be angry with your son.I think he can do better next time.(改同义句）
问题解答：
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