Singular and Plural Nouns

I need a pair of (a)   (shoe in plural)

Which sentences are correct?

• I have an egg, an organge and a apple

• That is a man over there

• Mountains are very high

• She is an beautiful woman

When do put A on a noun?

What are they?

• They are sunglass

• It's a sunglasses

• They are sunglasses

• It's an sunglasses

Which plural words are correct?

• Watches - Boxes - Apple

• Camera - Wallet - Keys

• Credit Cards - Dictionaries - Pencils

• Books - Classes - Gloves

What is it?

• It's a ID card

• It's an ID cards

• It's an ID card

• It's a credit card

Is IT the subject for objects?

• Yes

• No

Choose the correct sentences

• It's a key

• They're key

• It's a keys

• They're keys

I have some ________ (box in plural) in my room and _____ (a/an) desk

(a)  

Can we use A/AN with plural nouns?

• Yes

• No