are you sure ()they will come

are you sure ()they will come are you sure they will come back___?A.before long B.long bef Are you sure your mother will come?they asked(转换为间接引语） Are you sure they will come back___?正确答案是A为什么? 1.Tom asked:"Are you sure your mother will come?" are you sure they are I'm sure they will come. I'm sure if you come here,you will find how nice they wil be 改错Do you sure they will come to my birthday party are you sure __ simon will come tomorrow?yes,but i'm not sur mr tomson asked me "are you sure your mother will come here. 在线等i am sure they will come.是什么从句?