Our city has changed a lot; who can tell what it will be like in ___ ten years?
—What qualities does a person need to become an astronaut?—He ________be knowledgeable,independent and creative.
Li Gang was required to apologize ________the people present at the meeting________what he had done.
—Have you heard that George quit his job?—Yeah, but I can't________why he did so.
—Tony, you must have noticed the student who broke the glass.—I'm sorry.I________attentively.
—Sorry for the delay.I got lost in the mountain.—That's OK.You're safe and that's what________.