Open the brackets and put the verbs in the proper tense and voice.
The Symbol of Canada
Canada’s vegetation (to be) rich and varied. But one Canadian tree (to become) the most prominent Canadian symbol. Its leaf (to find) in Canadian flag, coat-of-arms, coins, uniforms of Canadian athletes. This tree (to be) maple. Long before the first European settles (to come) there, Canada’s aboriginal peoples (to discover) the food properties of maple juice, which they (to gather) every spring. According to many historians, the maple leaf (to begin) to serve as a Canadian symbol as early as 1700.
Since 1965, the maple leaf (to be) the centerpiece of the National Flag of Canada and it (to become) the most prominent Canadian symbol, nationally and internationally. Maple leaf pins and badges proudly (to wear) by Canadians abroad, and (to recognize) around the world.

1. They saw black cat yesterday. They didn’t see black cat yesterday. Did they see black cat yesterday ?

2. Every day we go to school. Every day we don’t go to school. Do we go to school every day?

3. She has been in Moscow twice this year. She hasn’t been in Moscow twice this year. Has she been in Moscow twice this year?

4. They are dancing now. They aren’t dancing now. Are they dancing now?

5. Tim went to café with his friends 2 days ago. Tim didn’t go to cafe with his friends 2 days ago. Did Tim go to cafe with his friends 2 days ago?

6. He is sleeping now. He isn’t sleeping now. Is he sleeping now?

7. We have just eaten meat. We haven’t just eaten meat. Have we just eaten meat?

8. Ann usually meets her friends. Ann doesn’t usually meet her friends. Does Ann usually meet her friends ?

Объяснение:

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.