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Dogs and Humans
The dog is considered to be the best friend of man. This is because they are loyal and friendly. Scientists say that growing environment that [1. IS] by animals CAN HELP to create a better IMMUNE SYSTEM. Dogs [2. ARE] one of the world's MOST POPULAR LIVE [3. CREATURES] and THEY ARE friends. The Siberian [4. DOG] is friendly with families. Dogs even traveled to space; Strelka and Belka 6, the Earth and safely landed on the [5. SC.] BE.
Правильный вариант текста после замены слов в заглавных буквах:
Dogs and Humans
The dog is considered to be the best friend of man. This is because they are loyal and friendly. Scientists say that growing environment that is by animals can help to create a better immune system. Dogs are one of the world's most popular live creatures and they are friends. The Siberian dog is friendly with families. Dogs even traveled to space; Strelka and Belka, the Earth and safely landed on the SC. BE.