I am a League member. I volunteer my time ___________ others.
---_______________? ---She is warm-hearted.
---May I speak to Mr. Smith? --Sorry, he __________Beijing and he ________there for two weeks.
---Did you borrow the comic book from the library?---Yes. I _____ it for three days. I_______ it this afternoon.
—Have you used the new computer ______? —Yes, I have. I have ______ used it.
—Oh, dear! What ______ so terrible?—The food on the table goes bad. I’ll throw it away in a minute.