--- Why do you always put this book in your backpack?--- Because this book ________ my interest in the study of history.
—I can hardly believe my eyes.Is that you,Lucy? —Yes.It has been almost 20 years________we were together.
—________will the fog and haze last? —I’ve no idea.There is no sign of an end.
Miss Li________English in this school since she moved to this city from her hometown.
They________here for more than ten years.
The famous writer________eight popular books since 2005.