—The dictionary is an important _______ for students .Each of us must have one . —I think so .
—Jim, remember to return this book by Friday. —_______.
Mr. Wang has left for Guangzhou. He ____ a speech there in two days.
If my frirends have any problems, my door is ______ open to them.
As time____, you'll come to think of English as your friend and love it.
—It's so late. Why not write the report tomorrow? —But I don't know _______ I can do it if not now.