42. The number of jaguars breeding populations in significant areas of the western United States has deceased in the past century.______
举一反三
- In the United States the cost of living has been ____(持续地) rising for the past few decades.
- 7.The extraordinary Mexican()has delivered millions of illegal immigrants to the United States over the past 30 years.
- Not until the dedication of Yellowstone Park in the late nineteenth century（）a national park. A: the United States had B: did the United States have C: when the United States had D: the United States having
- The United States has 48 states on the continent.
- 5. It can be inferred that the United States is not thebest choice for jaguars to live from the evidence that they don't settle anywherehere. ( )