Ех 5.
1) bigger, А
2) shorter, В
3) taller, А
4) thinner, В
5) cleverer, В
6) smaller, В
Ex. 6
You must close the gates.
You must walk slowly and quietly.
You must keep your hands away from the animals’ mouths.
You mustn’t feed the animals.
You mustn’t park your car inside the farm.