He is _______ honourable man.

• a
• an
• the
• zero article
Correct Option: B  [ an ]

Remark: "honourable" starts with sound of "vowel"

Our office employees have formed ________ union.

• the
• an
• a
• no article
Correct Option: C  [ a ]

Remark:

_________ rich and poor, young and old met together.

• a
• an
• the
• zero rticle
Correct Option: D  [ zero rticle ]

Remark:

Rita is ________ heir of her father's property.

• the
• an
• a
• no article
Correct Option: B  [ an ]

Remark:

Let us discuss __________ matter seriously.

• a
• an
• the
• zero articles
Correct Option: C  [ the ]

Remark: