Raspuns:
1. They always sing during the .... class. (nu stiu ce ai vrut sa spui prin claths)
2. They always sing their favorite song.
3. Water freezes at 0 °C.
4. People travel more often these days.
Explicatie: La primele doua propozitii se spune ca este un obicei (ca si la ultima propozitie). La numarul 3, se spune ceva ce se intampla, o explicatie.
English version: At the first two sentences is just like a habit, at the last sentence too. At the third sentence, it says what water is going to do and it refers at water in general.