The students _____ busily when Miss Brown went to get a book she ____ in the office.
Would you be __ kind as to lend me a hand?
Of all the studetts, he prepares his lessons ___.
---How old is your sister? --She is __ than I.
I don’t think English is __ a language as Russian.
---Could you give me some ink? ---Sorry, I haven’t ___ left myself.