Question

There is someone in the room .............. I certainly heard a great noise.
a) and
b) but
c) for
d) so
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Answer 1

Answer :-

Question - There is someone is the room ___________i certainly heard a great noise .

Here the answer will be so !

=> There is someone in the room _so_ I certainly heard a great noise .

we use so + adjective or adverb !

just take an example - I got late because it was a long journey so I am very tired .

" so " is used as :-

So + adjective (so difficult), so + adverb (so slowly) also

Another example - I am feeling " so "nervous because my exams are ahead .

My room is little small " so " that I am shifting from there .

I have provided some examples of using " so " in a sentence :) so that it will easy to understand !