---Is that Lucy’s sister, Lily?---No, it _______ be her. She has gone to English.
Which of the following organizations is not a charity? ___________.
This problem is so tough that only______ students can solve it.
Although you have lots of difficulties, you must ______your work.
He _____get up late, but now he gets up earlier.
Nothing can ______ the girl from _____ there.