21. Mr. White, who comes from ____ European country, has formed _____habit of attending ____ church on Sundays．
A．an; /; the B．a; a; a C．an; the; / D．a; the; /
22. —How did you find your missing Mp4?
— _________.
A. It works well B. It was in good condition C.I found it home D. Quite by accident
