Question

用宾语从句或表语从句翻译句子。

他们看上去这样苍老，那是因为他们曾经辛辛苦苦地劳动了十年。

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Answer 1

答案：They looked so old．That's because they had worked hard for ten years．
解析：

表语从句，如果从句表原因，则用because引导。