There is little reason to believe that the United States will ______ from its stated goal of regime change in Iraq.

单项选择题It is the first of several agreements United States hopes to reach as it attempts to reduce, labor costs by $5.8 billion and ______ bankruptcy.

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.