Two basic things we have been revising at the beginning of this year are the verbs to be (ser o estar) and to have (tener). Do the next exercises... you do understand, don't you?
We have also practised the comparative form in adjectives, here you can find some more practice:
Check this summary if you don't remember how comparative adjectives work:
And to revise the use of: THIS, THESE, THAT, THOSE do this exercise.
Doing all these exercises won't take you very long. More practice coming soon...