I don’t think English is alanguage as Russian

– Who are the teenagers gathering atthe school gate— Well, if you _____ know, they are allmy visiting students.

Look! There is ________ cat inthe tree.

She started studying medicine at college, but ________ to Business Studies in her second year.[ ]

It is very kind _______ you to help me with my houseworkIt is hard _____me to do all the work