---Are you still busy?---Yes, I _______my work, and it won’t take long.
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.
Every minute is made full _______ of _______ our lessons well. A. to use; study B. use; studying C use; to study D. used; studying