The situation forced my mother and I exchanged our roles as child and caretaker, making me grow up much faster than the _____ child.
__________ most efficient way to understand thousands of new words is to gain __________ good knowledge of basic word formation.
—Can you help me with the math problem, Dad? ___________. —OK, let me think it over.
— Oh, my God,I left my portable computer in the taxi! — ______. Let’s call the taxi company first.
---______ he managed to solve the problem? ---Oh,he turned to Professor Lee for advice.
-----_________ you interrupt now? can’t you see I am on the phone? ---- Sorry Sir, but it’s urgent.