Sentence Completion

 Correct usage is "need not do" as need is being used as a modal..

 Correct usage is "does not dare to come" or "dare not come"

 Since we are taking about a person ans he is singular so we will use "Was"

Here "committee" is taken as one as its given that it arrived at 1 decision. Hence, it will take singular verb "has"

 Since here it is given "their opinion" hence, we will use plural verb i.e. "are".

 This question is about the sequence of pronouns, order is: 2nd person, 3rd person, 1st person pronouns.
You, he and I are good friends. Here it is a question of etiquettes rather than grammar.

 When the compound subject, whose parts are joined by and, is modified by the word each it takes singular verb. Hence, 1 is correct.

 "Question" is singular. Hence, it will take singular verb.

 "A pair of trousers" denotes singular. Hence 2 is correct.

 "It" takes singular verb. Hence, 1 is correct.

 Spectacles is plural, so it will take plural verb. Hence, we will use "have".

Disappointment is singular. so, it will take singular verb. The word 'repeated' denotes that it is continuing in the present also. So, 1 is the correct choice.

 "More than 1" denotes plural so it will take plural verb and this is the case of present tense . Hence, 2 is correct.

 In case of not only but also "verb" follows second subject.

 Since "only guide" denotes singular subject, hence it will take sigular verb.

 Since "has" is used so we will take singular subject . Hence, 1 is correct.

 case of simple present tense and subject is singular so  "valueables" is correct .

 Case of simple present tense and subject is singular so verb used will also be singular

When a number and unit form a compound adjective before a noun, they must be hyphenated. The unit remains singular in hyphenated compound adjectives (e.g., forty-foot, ten-year, five-mile). Forty-feet would only be correct as a noun phrase after the article (a well of forty feet).

The blind refers to a generic group of people ...thus, it takes a plural verb.

 "have" is plural. Hence, we will use plural "trousers".

 "Beggars" is plural. Hence, "alms" is correct usage.

This is case of simple present tense and "a house" is singular. Hence, we will take singular verb "outskirts"

The subject is Nothing but peak over peak (peak after peak), which is singular because it refers to a single phenomenon or arrangement. The verb must agree with the singular subject, so appears (singular) is correct rather than appear (plural).

 not only but also always follow second subject. Since in the given sentence 2nd subject is singular so 2 is correct.