21．If I drive in this city myself, I’ll probably get lost as I haven’t got very good sense of ________direction．
A．a; 不填 B．the; 不填 C．a; the D．the; a
22．_______ , I’ll wait for you to have dinner together. Be back as early as possible.
A. However late it is B. No matter how it is late
C. However it is late D. No matter how late is it
23．They are just college graduates and don’t realize ____ to start and run a company.
A. what takes it B. what they take
C. what takes them D. what it takes
