The woman _______ is singing in the hall is our teacher.
—Look, someone left a book.—Oh, yeah … This book ________be Kitty’s. Only she likes to read this kind of books.
Look, so many people are running out of the station. I wonder what ________.
—Which of the two pairs of shoes will you take?—I’ll take ________. They are too small for me.
People who eat a balanced diet should be ________ than those who only eat hamburgers.
—Have you finished your homework yet?—Yes. I _________ it twenty minutes ago.