Answers

2015-09-09T16:01:19+05:30
The cattle are grazing in the ground.
in my book the same sentence is given as the cattle were grazing in the field
i think there is no mistake
1 5 1
we cannot use is
it is always in plural as per my book
first you have written something else
and now you have changed
first you have written is
2015-09-09T16:08:15+05:30
ThereĀ is no mistake in this sentenceĀ 
1 5 1
but i posted later
but you didn't knew
you wrote after me
you didn't even knew the answer
then explain