1) Lena swept the floor on Sunday. 2)Lena was sweeping the floor from eleven till twelve on Sunday. 3) Did they go to the wood Last Sunday? 4) When they were sailing down the river they saw a little island. 5) We were working the whole morning yestarday.6) Mother was cooking dinner at three o'clock yesterday.7) She finished cooking at three o'clock yesterday. 8) At half past four yesterday we were having dinner. 9) They translated a difficult text yesterday. 10) I opened the window at six o'clock yesterday.11) Did you go to the cinema yesterday? 12) I didn't see Mike last week. 13) When I opened the door, my friends were sitting around the table. 14) When did you begin doing your homework yesterday? 15) We were discussing the latest news from three till...