Not only Pinki but also her friends _________ buying books.

• is
• has
• have
• are
Correct Option: D  [ are ]

Remark:

Neither of the two stores _________ open.

• are
• is
• has
• have
Correct Option: B  [ is ]

Remark: Sentence begins with "neither" or "either" without the "or/nor" combination, the verb is singular.

___________ many times every winter in

• It snows
• It snowed
• It is snowing
• It is snow
Correct Option: A  [ It snows ]

Remark:

Not Amit but his brothers ______ to the store

• walk
• walks
• are walk
• have walk
Correct Option: A  [ walk ]

Remark: If plural subjects are joined by "or," "nor," or "but," the verb must only agree with the subject that is closest to it.

One person __________ and several others were injured as the police opened fire on protesters.

• were killed
• was killed
• had killed
• was killing
Correct Option: B  [ was killed ]

Remark:

Neither John nor Alex __________ scored the century.

• have
• was
• has
• is
Correct Option: C  [ has ]

Remark: in case "Neither-Nor" the verb must agree with the second subject (the subject closer to the verb).

Either you or I should ___________ the lead.

• took
• taking
• takes
• take
Correct Option: D  [ take ]

Remark:

This magazine _________ twice weekly.

• is appearing
• appearing
• appears
• appeared
Correct Option: C  [ appears ]

Remark: Subject is "Magazine" a Singular noun, go with singular verb.

Sir, our list of grievances here ________ a long one.

• are
• were
• is
• was
Correct Option: C  [ is ]

Remark: "list" is a singular noun, and when referring to a singular entity, the verb should also be singular.

Mother ________ to talk to you.

• want
• wants
• wanted
• wanting
Correct Option: B  [ wants ]

Remark: Subject is "Mother" a Singular noun, go with singular verb.