It looks like you have a list of sentences that need to be converted into reported speech. Here are the transformations for the sentences you provided:

118. Her mother asked where she was going.
119. The girl asked the boy how many books he wanted to buy.
120. He asked her which sport she liked.
121. He asked me how I could get there.
122. She asked how the weather was.
123. We asked how they had gone.
124. He asked me why I had to do that work.
125. She asked him what he was doing.
126. They asked us what we would do when we left school.
127. He asked her how she had known his name.
128. My mother asked why I hadn’t phoned her.
129. Tuan asked Huong when he could see the doctor.
130. I asked them where they were going.
131. Thu asked Tien where he was going to spend the holiday.
132. I asked Hung how big the classes were.
133. She asked what sorts of food they served.
134. The boys asked the girls how long they were staying there.
135. He asked me what I was going to study.
136. She asked her what kind of sports she liked best.

If you need further assistance or more examples, let me know!