---What is our earth like ________from the moon? ---Well, our earth, with water ________ 70% of its surface, appears as a "blue ball".
—Tom hadn’t worked hard and failed in the exam. But he said that was because the problems were too hard.—That is “ .”
It was several minutes before I was what was happening.
John opened the door. There he had never seen before.
—Is Bob still teaching?—I’m afraid not. He is said the school as he has become a businessman.
—I wonder how much you charge(要价) for your services.—The first two are free the third costs¥30.