Give advice beginning with "avoid" to your friends: a) when they are going to have a picnic; b) when they are going to ride bicycles in a city or in the country; c) when they are going to travel round the world.

a. Avoid throwing away cans, bottles and packets in the country.
He выбрасывайте банки, бутылки и пакеты загородом.
b. Avoid riding bicycles along roads, crowded with cars.
Hе катайтесь на велосипедах вдоль дорог, заполненных машинами.
c. Avoid dropping litter in the sea.
He бросайте мусор в море.