We can infer from Paragraph 1 that______.
A. the U. K. has strict travel restrictions
B. all Britons support travel restrictions
C. most people like travelling to Britain
D. most developed countries dislike immigration
According to Paragraph 3, which one is NOT true？
America exports more to Mexico than to China.
B. There may be security concerns across the borders.
C. American government now values much on the trade with Mexico.
D. Statesmen have greatly improved constructions across the borders.
The text mainly discusses about______.
A. rebooting of NAFTA and its concerns
B. employment in North American countries
C. contributions of North American countries
D. relationship among North American countries
The underlined word "safeguard"(Para 1 , Line 6)most probably means______.
A. prevent
B. protect
C. hinder
D. convince
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