Should exercises and have to (10th grade)

Hi dear students.

These are the links to practice the modal verb should and have to. 

https://elt.oup.com/student/project3rdedition/level3/unit6/grammar/exercise1?cc=us&selLanguage=en
http://www.englisch-hilfen.de/en/exercises/tenses/have_to.htm

Bye, take care. 

Teacher: 

Viviana Pongutá