Fill in the blanks with the most appropriate words:
______ Monday morning I had been waiting _____ you _____ two hours but you didn’t come.
(a)In/for/at
(b)On/-/for
(c)-/with/during
(d)On/for/for
(e)On/for/-

Hint: Read the given sentence carefully. Try to make out the core meaning of it. Find out the suitable preposition which completes the sentence.

Complete answer: A preposition is a word used to link nouns, pronouns , or phrases to other words within a sentence.
In the first blank, preposition “on” will be used because preposition “on” is used to specify days or dates for instance ‘Monday morning’. In the second blank, preposition “for” will be used because preposition “for” is used to mean “because of” (waiting because of you).In the third blank, preposition “for” will be used because preposition “for” is used to indicate duration for instance ‘two hours’.
Now, let us examine all the given options to find out the correct option :
(a)’In/for/at’-It can not be the correct answer as we cannot use 'in' before 'monday' in the given sentence. 'In' is used to express something that is enclosed into something.
(b)’On/-/for’-It can not be the correct answer as the second blank cannot be empty.
(c)’-/with/during’-It can not be the correct answer as we can’t use 'during' before 'two hours'.
(d)’On/for/For’-It is the appropriate answer as 'on'(here specifies the day) is the right preposition to use before monday, 'for'(here specifies the person) before 'you' and 'for’(here specifies the time) before 'two hours'.
(e)’On/for/-’-It can not be the correct answer as the last blank cannot be left empty, a preposition has to be filled in it.
As we have analysed all the given options, we can easily figure out the correct option. Hence, option ‘d’ is the correct option.

Note:All the other options are plausible distractions. The other options aren’t applicable for this sentence.