Question

зачеркни лишнее слово в каждойьстроке 2 a cockerel, a hen, a cow, a duck,3 a camel, an elephant,an eagle,a monkey,4a whale, a fish,a crocodile,a dolphin

Answer 1

2.  a cow - это млекопитающее, а все остальные - птицы.
3.  an eagle - это птица, а все остальные - млекопитающие.
4.  a crocodile - это речное животное, а все остальные - морские

Answer 2

2 a cockerel, a hen, a cow, a duck, 3 a camel, an elephant, an eagle, a monkey, 4 a whale, a fish, a crocodile, a dolphin.

In each line, the word "a" appears before every animal except for one. So, the extra word in each line is the article "a" before the first animal. Thus, the corrected lines are:

2 cockerel, a hen, a cow, a duck, 3 a camel, an elephant, an eagle, a monkey, 4 a whale, a fish, a crocodile, a dolphin.