China _____ a sharp increase in the number of Social Networking Services users in the past years.
When the big bills for mother's hospital care came, father was glad he had money in the bank to _____.
The farmers were more anxious for rain than the people in the city because they had more _____.
It is clear that the whole world is passing through a social revolution in which a central _____ must be taken by scientists and technologists.
The author of the report is well _____ with the problems in the hospital because he has been working there for many years.
With the change of the economic foundation the entire immense superstructure is _____ rapidly transformed.