By "common resources" (Paragraph 2), the author means that ______.
A.the resources possessed by the United States should be shared by other countries
B.Americans have the right to consume resources both from their home country and from abroad
C.it is difficult to distinguish the resources possessed by America from those possessed by other countries
D.all the resources in the world should be shared by all the countries
The biggest challenge for a consultative salesperson is ______.
A.face-to-face discussion
B.tailor-made presentation
C.appropriate pitch of voice
D.large amount of research
A.role
B.subject
C.joke
D.supplement
A.when
B.why
C.where
D.whom
According to the passage, the parity system is used to ______.
A.encourage farmers to produce more grains in the future
B.lower the cost of producing agricultural product
C.determine the prices below which grains will not be sold
D.ensure that the farmers' interest is properly protected
The police searched the building __ but failed to find out where the bomb was.
A.throughout
B.fully
C.altogether
D.thoroughly