— Mr. Smith, Millie’s homework isn’t here.— Well, let her _____ it here tomorrow.

—I hear the plane of MH370 has been found!—Really？I wonder if some people are still alive.

---Who cleaned the blackboard yesterday, Dick?---John ____.

--What’s the matter with your mother? ---She ______ a sore throat. 　　  

I can't understand what the book is about because it          in English．