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 the books nor the magazine ________ on the shelf.

• were
• have
• have been
• was
Correct Option: D  [ was ]

Remark: The verb agrees with the closer part of the subject, which is "magazine" in this case. Here "Magazine" is singular subject, so "was" used.

Most of the labourers _____________ on the strike.

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

Remark:

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.

The ruler and the minister ____________ killed.

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

Remark:

Every girl and every boy ________ given a silver medal.

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

Remark: If a subject is modified by the words "each" or "every" that subject is singular and will take a singular verb.

The horse and the coach ________ arrived.

• have
• have been
• would
• has
Correct Option: A  [ have ]

Remark: When two singular nouns joined by "and" refer to the same person or thing, the verb is singular.
But here article "the" used twice before each noun to indicate two different subjects, thus "have" used.

Either you or I should ___________ the lead.

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

Remark:

A bouquet of flowers ___ on the table.

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

Remark: The subject "bouquet" is singular, so it takes a singular verb.

Mathematics ___ my favorite subject.

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

Remark: "Mathematics" is treated as a singular subject even though it ends in "s".