Can we continue doing the exercises I started in my last lesson (with a different teacher)?
Would you mind if we finish off the exercises I started in my previous lesson?
Is it ok if I finish the exercises I started in my previous lesson first?
「レッスンの続きをお願いしてもよろしいですか?」= Can we continue doing the exercises I started in my last lesson (with a different teacher)? / Would you mind if we finish off the exercises I started in my previous lesson? / Is it ok if I finish the exercises I started in my previous lesson first?
ボキャブラリー
Can we / Would you mind if / Is it ok if = お願いしてもよろしいですか?
continue = 続ける
last(previous) lesson = 前のレッスン
finish = 終わらせる