—Look! What a nice classroom! — Yes, it ________ every day.A. is cleaning B. has cleaned C. is cleaned
To finish the work on time, we'll have to work____ hours a day.
—When did the old man die? —He ________a rainy winter evening.
—Could you tell me ? —Certainly.
Tom said he had never been there, but he was .
— Don’t _______ too late, or you will feel tired in class. — I won’t, Dad.