40. More actions should….taken to protect wildlife immediately.
A. been B. be C. have D. being
IV. Read the following passage and then choose the best answer.
One of the most urgent environment problems in the world today is the shortage of clean water. Having
clean drinking water is a basic human right. But acid rain, industrial pollution and garbage have made many
sources of water undrinkable. Lakes and even entire seas have become large pools of poison. Lake Baikal in
Russia is one of largest lake in the world. It contains a rich variety of animals and plants, including 1,300 rare
species that do not exist anywhere else in the world. But they are being destroyed by the massive volumes of
industrial pollutants which pour into the lake everyday. Even where law existed, the government did not have
the power to enforce them. Most industries simply ignore the regulations. The Mediterranean Sea occupies 1%
of the world's water surface. But it is the dumping ground for 50% of all marine pollution. Almost sixteen
countries regularly throw industrial wastes a few miles off shore. Water is free to everyone. A few years ago
people thought that the supply of clean water in the world was limitless. Today, many water supplies have been
ruined by pollution and sewage. Clean water is now scarce, and we are at last beginning to respect this precious
source. We should do something now.
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