The water in the river nearby will be dirtier than before if nothing __________.

Kangkang, how many apples are there _____ the tree? —Too many. [ ]

The twins are so much alike that it is difficult to tell one from________.

Do you know the girl in the white dress? —-Yes, she’s ____ university student. She always takes _____ umbrella with her.

No matter what happens, the fact that Diaoyu Island belongs to China will ______ change.