Copper is __________ Useful metal. (appropriate article)

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

Remark: "a" is correct because "useful" starts with a consonant sound. "An" is used before words that start with vowel sounds.

You are _________ fool to say that.

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

Remark:

It is _______ half past six by my watch.

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

Remark:

The boy is studying in ____________ university.

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

Remark: "a" is used with "university" ( Vowel word with a consonant sound.)
similar: a one-act, a one-eyed, a one-man army, a union.

She is suffering from ________ small-pox.

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

Remark:

_______ gift she gave him was very expensive.

• A
• An
• The
• No article
Correct Option: C  [ The ]

Remark:

We have bought _________ LCD television set.

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

Remark:

It was ________ unique sight.

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

Remark:

Did you get married after leaving ________ University?

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

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.