我国台湾岛多火山地震,原因是位于( )
The fire started on the second floor and it wasn't long ______ the whole building was burned down.
— I haven't got the reference book yet, but I'll have a test on the subject next month.
— Don't worry. You _______ have it by Friday.
绿洲农业主要是在____ 地区,用水牛耕地的主要是____ 地区.