Gradually, (5) ................., the importance of writing letters is decreasing to a point that majority of us have to (6).....................a special effort to turn out something worthwh
Gradually, (5) ................., the importance of writing letters is decreasing to a point that majority of us have to (6).....................a special effort to turn out something worthwhile when we apply for a job or make a complaint.
A. therefore
B. however
C. in short
D. for example