Question

Vivian said that she _______(wash) the plates and dishes in the kitchen at that time.

Answer 1

答案：Vivian said that she 【was washing 】the plates and dishes in the kitchen at

that time.

解析；从at that time.可以知道要用进行时态.且said用到了过去时态，所以要用过去进行时态.

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Answer 2

Vivian said that she was washing the plates and dishes in the kitchen at that time.
at that time/ this time yesterday/ from xx:xx to xx:xx yesterday等为过去进行时的标记

Answer 3

was washing

由said可知句子的时态为一般过去时，
由at that time可知句子描述的是某一时刻正在进行的动作，
因此答案应该为:was washing。