单项选择题

If all the viruses on the planet were to disappear, a global catastrophe would (), and the natural ecosystems of the earth would collapse in a spectacular crash under burgeoning populations of insects.

A. varnish
B. disperse
C. contaminate
D. ensue

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单项选择题

A Monitor TIPP poll last month found that young people and seniors held similar views when asked to () the importance of US military action to remove Saddam Hussein from power in the next months.

A. advocate
B. foresee
C. supervise
D. gauge

单项选择题

The purpose of the passage is().

A. to warn about the dangers of revolutions in towns
B. to warn about the possibility of a population explosion
C. to suggest governments should change their priorities
D. to suggest governments invest in more housing in cities