Question

Fill in the blanks with the appropriate word.
The old man was _________ weak to open the door.
A. Very
B. Far
C. Much
D. Too

Answer 1

Hint: Too is used to modify an adjective creating the meaning of an unacceptable,excessive degree. Here, the sentence indicates anything negatively to a degree more than is permissible.

Complete answer:
Option A: Very is used to give emphasis to an adjective or adverb also it can be used to intensify the meaning of an adjective. Very can be used in the following ways: as an adverb (before adjectives and adverbs) Example: It had been a long day and he was very tired. She writes very well. Thus, option (a) is absolutely incorrect.
Option B: Far is used mainly in questions and negatives when we are talking about distance. ‘Far’ is again used where a comparative degree of adjectives are used. Thus, option (b) is absolutely incorrect.
Option C: ‘Much’ is used to emphasize a comparative adjective. 'Much' is used when we are speaking about a singular noun. Much is often used before ‘prefer’ and ‘appreciate’: I would much prefer to be alone. Your hard work is much appreciated. Thus, option ( c ) is absolutely incorrect.
Option D: ‘Too’ is used to modify an adjective creating the meaning of an unacceptable, excessive degree. As an adverb, too is used to describe something that’s “in addition, furthermore, moreover.” It’s another way of saying “also” or “as well” but usually fits more naturally at the end of a sentence. For example, “If you’re getting ice cream, I want some too!” Here, the sentence indicates anything negatively to a degree more than is permissible. Hence, option (d) is correct.

Note:
 The sentence above highlights the incapability of the man due to excessive weakness, it needs an adverb to highlight the severity or weakness, it needs an adverb to highlight the severity of the problem.