题目内容
用所给动词的正确时态和语态完成下面句子
In most parts of the world human problems _______(study)at that time．
答案：
解析：
解析：
|
were studied |
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题目内容
用所给动词的正确时态和语态完成下面句子
In most parts of the world human problems _______(study)at that time．
|
were studied |