These are core topics. You will not see stuff like:
"As you compare the contribution of nature versus humanity in the production of ozone unfriendly gasses, discuss the relative impact that human economic activity has on ozone depletion."
You might very well say, "I am not happy with that topic in any language."
Tip: It is not meant to be a hit-and-run activity. You should return to every topic, and each time it should be a little easier, your sentences will get a little more fluid, longer, and descriptive. On some topics, you will eventually break out of the structure provided and say your own thing (just like in your native language).
The steps to doing well:
Step 1: Master the vocabulary on the corresponding vocabulary list.
Step 2: Listen and read the offered examples.
Step 3: Model your own presentation. That could be a direct verbal attempt. It could be that you write out your own attempt first, then you read it, and practice it till you can say it from memory.
Note: That is fine to bootstrap by reading and then memorizing. Please remember the most important aspect of doing this. THINK as you speak. FEEL as you say. You are not a robot. You need to acquire your own voice in all of of this. Once you have it, it is like walking without crutches! Now the fun starts. Now you might want to study supplemental vocabulary to make your speaking experience way better. This will impact your ability to write, read and listen of course.