21. Macao, _____ city with _____ area or 28.6 square km, has ______ population of 530000

A. a; an; /     B. the; /; a    C. a; an; a      D. the; an; /

22. The young man is being questioned by the police in relation to the _______ murder last night.

A. advised     B. attended   C. admitted    D. attempted

23. How I wish I had saved the file I _____ on.

A. am working   B. work      C. worked    D. was working