Unless we ______ now we can't be on time.

• will start
• start
• starts
• will be starting
Correct Option: B  [ start ]

Remark:

My friend, philosopher and guide _________ my father.

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

Remark: "friend, philosopher and guide" refers to one person.

While eating he _______ a lot.

• talk
• talks
• talked
• taking
Correct Option: B  [ talks ]

Remark: Singular subject takes singular verb.

The furniture in this room _______ made of teak.

• are
• have
• is
• No correction
Correct Option: C  [ is ]

Remark: Furniture is an uncountable noun and is not used in the plural, so furniture is a singular subject.

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.

The public _______ the thief red-handed.

• catch
• caught
• is caught
• catching
Correct Option: B  [ caught ]

Remark:

Either you or I should ___________ the lead.

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

Remark:

The Moon _______ around the Earth

• move
• moving
• moved
• moves
Correct Option: D  [ moves ]

Remark: Subject is "Moon" a Singular noun, go with singular verb.
When universal truths are mentioned, the verb used should be the simple present tense.

Every man, woman and child ________ charmed.

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

Remark: