a, an, the and no article

____ladies and____gentlemen,please rise for ____President of ____United States of America.

We need to buy ____sofa and ___ armchair.

My sister is playing ____piano. She has just finished ____new piece for ___ bigger opera that she is composing.

You can usually see ____bears around _____CCLUANL.

_____onions are vegetables, but________ tomatoes are fruits.

___highest mountain on _____earth is ____Mount Everest.

Do you like ____red T-shirts more than ____blue T-shirts?

Let´s meet in ____ afternoon on ____Monday.

Last year we went to ____London and visited ____Tower of London.

Let´s go to ____ bed. I´m very tired.