The government was faced with the demand that the tax ______ (尽快废除)．

A．Distinguished professors at research universities should focus on research only.
B．The separation of teaching from research may affect the quality of future scientists.
C．It is vitally important to improve teaching in elementary schools in order to train new scientists.
D．It is impossible to combine research with teaching due to the rapid development of modern science.

A．is a desirable result of economic development
B．brings about greater opportunities for land dealers
C．lead to an efficient, positive use of land in the form of vertical growth
D．is annoyingly artificial and meaningless