I found that it was difficult to do the maths problem I found to do the mat——青夏教育精英家教网—

摘要：I found that it was difficult to do the maths problem I found to do the maths problem.

网址：http://m.1010jiajiao.com/timu3_id_2848256[举报]

句型转换。

I found that it was difficult to do the maths problem.（改为简单句）

I found ________ ________ to do the maths problem.

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