Because the United States has little tin, ___________

单选题Because the United States has little tin, ____________ produced in the rest of the world.

1Within an area of only 100 miles, Death Valley sinks to 282 feet below sea level while Mount Whitney ____________to a height of 14,494 feet.

2The cosmopolitan flavor of San Francisco is enhanced by ____________shops and restaurants.

3____________that increasing numbers of compact-disc players will be bought by consumers in the years to come.