People thought _____ hard to live without the medicine.
______ will you come back? --- In an hour.How soon B. How often C. How long D. How far
Their house is _______ ours, but ours has a bigger garden.
I don’t know the man _______ is looking after the old woman.
--____ you come to my birthday party tomorrow, Robert? --I’m afraid not. I have to study for my exam.
Parents will ______ more and more money on their children’s education.