[单项选择]There is much discussion about whether present economic growth is desirable．
A. 有很多关于现在经济增长的讨论。
B. 关于现在经济是否增长，有很多讨论。
C. 有很多关于目前经济增长是否理想的讨论。
D. 有很多讨论认为目前的经济增长很理想。

There is much discussion about whether economic growth is desirable. At an earlier period, our desire for material wealth may have been {{U}} (47) {{/U}} Now, however, this desire for more than we need is causing serious problems. Even though we have good {{U}} (48) {{/U}}, we may be producing too much, too fast.
Those who {{U}} (49) {{/U}} economic growth argue that we must slow down. They believe that society is approaching certain limits on growth. These include the {{U}} (50) {{/U}} supply of natural resources, the possible {{U}} (51) {{/U}} effects of industry on the natural environment, and the continuing increase in the world’s population. As society reaches these limits, economic growth can no longer continue, and the quality of life will {{U}} (52) {{/U}}.
People who want more economic growth, on the other hand, argue that even at the present growth rate there are still many poor people in the world. These {{U}} (53) {