Are there any answer choices?
<span>1. The Canadian Shield is a plateau that covers approximately half of Canada.
2. </span><span>Other names for the Canadian Shield include the Precambrian Shield
3. </span><span> It is made of primarily of granite
4. </span><span>covers 1.7 million square miles.
5. </span><span>contains deposits of iron, gold, silver, etc.
6. </span><span>Diamonds are also found in the Canadian Shield
7. </span><span>Four mountain ranges rise from the Canadian Shield
8 . The </span><span>highest points of the Canadian Shield are on Baffin Island and in northern Labrador.
9. </span>Millions of years ago, volcanic forces in the Canadian Shield formed mountains t<span>hat have eroded over time.
10. </span><span> First Nations peoples and</span>
<span>early explorers used waterways of the Canadian Shield as their main method of transportation.</span>
The politicians have been discussing the social program for the last month.
Are discussing is present continuous, have discussed is present perfect, discuss is present simple.
As you get data from experiments so you get knowledge from research
