We may find that learning a foreign language does not have to be________learning our mother tongue,but can in fact be twice ________.
I’ve worked with children before so I know what___________in my new job.
He studied hard at school when he was young, ___________leads to his success in his later life.
Mr. Smith is one of the foreign experts who ___________in China.
They are letting us use their computers, and ___________we are giving them the results of our research.
He ___________all his pockets but failed to find his passport.