None but _________ brave deserves the fair.

• the
• a
• an
• No article required
Correct Option: A  [ the ]

Remark: here adjective "brave" used as noun. "the brave" means "the brave people".

Cathy goes to ________ church every Sunday.

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

Remark:

Iron is _______ useful metal.

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

Remark:

__________ book you want is out of print.

• an
• the
• a
• none of these
Correct Option: B  [ the ]

Remark: "The" is used before the noun "book" to indicate that the speaker is referring to a specific book.

Joe Corrie's "Hewers of Coal" is _________ one-act play.

• a
• the
• an
• No article
Correct Option: A  [ a ]

Remark: