His sister was singing in the room when he got home (划线部分提问)
What his sister when he got home ?
Jim didn't fly to Beijing until he finished his work (同义句)
Jim to Beijing he finished his work
Jack may know her very well . (同义句)
Jack her very well (否定回答)
Will money be useful in the future ?
No , .
There's more pollution this year than year (同义句)
There . pollution last year than this year