chuyển câu chủ động sang câu bị động
1.they have given many talks on history and development of may day.
=>Many talks ...............................................
2.the clowns made the audience laugh a lot.
=> the audience.......................
3.they say that he has built this house for sale.
=>this house......................
4. He had someone repair his roof yesterday.
=>he had his roof..................
5.i need to polish my shoes .
=>my shoes need...........
help me:)))