— ________ invention the wheel is! — I can’t agree more. It is an invention that changed the world.
—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.