（1）His son will pass the exam.He said.改为含有宾语从句主从复合句 He said( )his son ( )( )the exam

（1）His son will pass the exam.He said.改为含有宾语从句主从复合句 He said( )his son ( )( )the exam
(2)Lucy hasn't decided which trousers to buy(改写为复合句)
Lucy hasn't decided ( )( )( )( ) buy
(3)I hope to see you again.(改为主从复合句)
I hope( )( )( )see you again.