21. This book tells ________ life story of John Smith, who left ______ school and worked for a newspaper at the age of 16.
A．the; the B．a; the C．the; 不填 D．a; 不填
22. —I’m sure Andrew will win the first prize in the final.
—I think so. He_______ for it for months.
A. is preparing B. was preparing C. has been preparing D. had been preparing
