1) There is a new _ _ a _ _ bin behind the desk.

1) There is a new _ _ a _ _ bin behind the desk.
1) There is a new _ _ a _ _ bin behind the desk.

1) There is a new _ _ a _ _ bin behind the desk.
填trash
trash bin 垃圾桶
意思是 在桌子后面有一个新垃圾桶