$Answer:$

`1.` The teacher asked me where my father worked.

`2.` A tourist asked how far it was from Ho Chi Minh City to Vung Tau.

`3.` Hoa asked Lan how many people there were in her family.

`4.` Tam's friend asked him how long he would stay in England.

`5.` The teacher asked Lien what her hobby was.

`6.` She asked Ba why he collected waste paper.

`7.` She asked her parents when they would visit Hanoi.

`8.` Mrs.Browns asked Thu what language she spoke. 

`9.` He asked Mrs.Brown what time school began.

`10.` Her friend asked him how he went to the airport.

`11.` She asked Lan when she learned English.

`12.` Lan asked Ba what they saved paper for.

`13.` Lan asked Lien how much this dress cost.

`14.` Ba asked Tam how often he washed his clothes.

`15.` She asked Mrs.Tam how her children enjoyed the trip.

`16.` Tam asked Huong what kinds of books she read.

`17.` She asked me what television program I liked best.

`18.` The teacher asked me what aspect of learning English students found most difficult.

$Explain:$

`@` Câu trần thuật gián tiếp có từ để hỏi:

$S_1$ + asked + somebody + WH-question/How + S9somebody chuyển ngôi nếu cần) + V(chuyển thì) + O...

$#Hoidap247$
$@Angelinazuize$