Помогите пожалуйста..

Ответ:

1) She thinks Maths is worse than Science.

2) Mark is the best singer in our class.

3) The most exciting day in the year is my birthday.

4) Mice are smaller than elephants and tigers.

5) Mary is the youngest person in their family.

6) Dolphins are more intelligent than hippos.

Объяснение: