---You have made great progress in your English study, haven’t you? --- Yes, but much _____ .
When he was a boy, he used to go there and watched _______.
Robert is said______ abroad, but I do not know what country he studied in.
Beijing was attacked by such a terrible sandstorm ______few citizens had ever experienced before.
He______ on this paper for ten minutes but he______only about sixty words.
Mr Wang______an article on how to improve spoken English last month, but I don’t know whether he has finished it.