-_______ weather it is! We can't go boating on Jiyang Lake.-Don't worry. Let's go to Zhangjiagang Library.
The baseball is _____ the floor _____ the desk.
--____________? --No, it isn’t.
--What are these? --_______ books.
如果你想知道对方姓什么时,你应该问_____________________________
_______ are my brother and sister.