Ответ:

Ex.2.

4) mathematics  5) biology  6) geology

Ex.3.

1) the biggest 2) the most intelligent  3) the longest  4) faster  5) the best  6) the funniest

Ex.4.    

1) snowed  2) talked  3) Did you go  4) heard  5) was jogging 6) was cooking

Объяснение: