Đổi câu chủ động sang bị động, bị động sang chủ động ( Thì Hiện tại đơn, hiện tại tiếp diễn, hiện tại hoàn thành) 1.The waiter has brought me this dish 2.Our friends send these postcards to us 3.Their grandmother has told them this story 4.Tim is ordering this train ticket for his mother 5.She is showing her ticket to the airline agent 6.Jim has baked this cake 7.They are going to buy a new apartment 8.The shop assistant hasn't handed these boxes to the customer 9.The board hasn't awarded the first prize to the reporter 10.Have you sent the Christmas cards to your family ? 11.Has the committee appointed Alice secretary for the meeting? 12.Tom doesn't give Anna a ride to school 13.Do they keep this room tidy all the time? 14.We haven't given Anna some bananas and some flower s 15.Have they moved the fridge into the living room?