" (a)   sky is blue today."

"He bought (a)   car last week."

"I saw (a)   interesting book in the library."

"We visited (a)   Eiffel Tower during our trip to Paris."

" (a)   cat on the roof is very noisy."

"She is wearing (a)   beautiful dress."

" (a)   water in this lake is very clear."

"He is (a)   honest man."

"I need (a)   book to read."