It was _____ computer games that cost the boy a lot of time that he ought to have spent on his lessons.
When he was alive, the old scientist used to say that knowledge ______ from practice and he gained his experience by doing a lot of practical work.
He ______ articles for our wall-newspaper these three years, and he ______ about forty articles.
--- ______ Betty this morning? --- Not yet, but she is sure to be here before noon.
--- Is Tom still smoking? --- No. By next Saturday he ______ for a whole month without smoking a single cigarette.
The vegetables didn’t taste very good. They ______ too long.