21. —What do you think of the car in the show room?
 —You mean _________ blue one. I think it is _________ nice car.
A. a; the                         B. the; a                       C. the; the             D. a; a
22. I’d like to live in a flat by the seaside—modern, comfortable and ________ with a view of the sea.
A. above all                    B. in all                        C. after all            D. at all
23. —How can I succeed in my work?
     —Be patient. Put your heart into it _________ you will make it.
A. or                            B. and                          C. but                   D. though