---Is the girl in the red skirt your sister?---No. It _______ be her. She has flown to Australia.
I want to do ______ this summer.
—Can you write the number eighty-five thousand, six hundred and twenty-six? —Yes, it is .
These flowers ____ me twenty yuan.
Don’t ______ him. He is very happy now.
--_______may I keep this book? --For two weeks.