Fill in the blank with the most appropriate word:
I am sorry ______ you.
(a)Disturbing
(b)To disturb
(c)Disturb
(d)Disturbed

Hint: Read the given sentence carefully. Try to make out the core meaning of it. Find out the subject, predicate and the object of the given sentence.

Complete answer: The given sentence conveys that the speaker is apologizing for disturbing the other person. We have to fill in the given blank with the correct form of verb of the word ‘disturb'.
Now, let us examine all the given options to find out the correct option :
(a)Disturbing-It is an adjective. It is the continuous form of ‘disturb’. It cannot be the correct answer. So, we will eliminate this option.
(b)To disturb-‘To’ is a preposition which means in the direction of; as far as. It will fit in the given blank and is an appropriate answer.
(c)Disturb-It is an adjective which means to make someone worried or upset. It cannot be the correct option so we will eliminate this option.
(d)Disturbed-It is the past tense of the word ‘disturb’. It cannot be the correct option as the sentence is not in the past tense.
As we have analysed all the given options and can easily figure out the correct option. Here, the correct word is – to disturb. Hence, option ‘b’ is the correct option.

Note: All the other options are plausible distractions. You must know the correct form of verb which has to be used in a particular sentence.