studied 是过去式,表示学习的动作已经完成,是与现在时态相对的,
had studied是过去完成时,与现在完成时相对,
题目中问题是 you speak very good japanese,是现在时态,故其答案应该与现在时态相对应,因此答案应该是 studied,
studied 是过去式,表示学习的动作已经完成,是与现在时态相对的,
had studied是过去完成时,与现在完成时相对,
题目中问题是 you speak very good japanese,是现在时态,故其答案应该与现在时态相对应,因此答案应该是 studied,