It’s quite normal to ten percent of the cost of a building for a period of six months or so, in case faults are found in it.
It was __________ you had done ________made it possible for you to improve your English.
—May I use your computer? —Sure, _____________
— What’s the matter? — The shoes don’t fit properly. They _____ my feet.
In this experiment, they are woken up several times during the night, and asked to report what they _____.
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.