将直接引语改为间接引语

将直接引语改为间接引语
（1） “ Do you often come to school by bus?”
my classmate wanted to know if__________________.
(2) "why can you finish it so soon ,children?"
Mom asked the children why ______________________.
(3) "Li Xin is better at English than math ," said the teacher.
The teacher said that ______________________________.
（4）“my father has been to Hong Kong twice”he said.
He said that______________________________________.
⊙ o ⊙ )