--- When did your father come back last night?--- He didn’t come back _______ he finished all the work.
—Could you please take the dog________a walk,Tony? —Sure,Mum.
Lisa spent all________day cleaning her room.
— I’d like to have a picnic tomorrow. — We’re too busy these days!
— British engineer,Tim Berners-Lee the idea of the World Wide Web in 1989. — You’re right,and the World Wide Web is 26 years old this year.
Tom does very well in exams. But he can work out the problems in his real life.