--What a clean kitchen!--Yes, and it _____ by my mother every Saturday.A. cleans B. is cleaned C. has cleaned
In order to ______ his large family, he must work hard.
He has never been to America ___________?
Usually people in Japan and Korea _______ when they meet for the first time.
After having a class, there _____ some students _____ games happily.
—Could you tell me ______? —Sure, just five minutes ago.