Réponse :
1) a. It's maybe cold.
b. I may go to Switzerland tomorrow.
c. She was maybe ill yesterday.
d. She maybe doesn't work anymore.
e. She may have went to visit her sister.
2) a. She may be at home.
b. They must be taking a ride in the country.
c. He must be having a break.
d. He may not drive back home.
3) a. question
b. possibilité
c. possibilité
d. possibilité
e. possibilité
4) a. may have an incident.
b. can get lost.
c. may start a fire.
d. pollute water.
e. destroy nature.
Voilà j'espere t'avoir aidée (: