—It’s meaningful us to do something for people in need.—It’s really nice you to think so.
—I hear that Tom’s father has gone to Africa. —Really? ____
Mrs. Wang found his little son ______ with his toys alone when she arrived home.
Our physics teacher told us that light _______ faster than sound.
She will have a holiday as soon as she _____the work next week.
I want to return the book to Jack, but I can’t find him. He the library . you can find him there.A has been to B has gone to C has left D went to