1.in North America
2.the
longest unguarded border in the world.
3. three oceans: Atlantic Ocean, Pacific Ocean and
Arctic Ocean.
4.a maple leaf.
5.along the southern border in such cities like Toronto, Ottawa, Montreal, Quebec City and
others.
6.The French
7.Elizabeth II, the Queen of Great Britain
8.Quebec
9. of The Niagara Falls, one of the world's most voluminous
waterfalls, famous both for its beauty and as a valuable source of hydroelectric power.
10.bilingual
11.French and English
12.the areas of health, education, social protection and human rights.
have flown
Объяснение:
have потому что мн. ч
а используется past perfect потому что не указывается точное время