It’s very nice _____ you to give me so good ____.

She is busy_______ her homework.

________ rapid economic developmentand political stability over the past three decades, but with them ________some social problems.

Hi , Ann. How can you improve your English so much–Oh, nothing difficult. The you work at it, the progress you will make.

any years since I saw you last, I __________ you at all.－Iwouldn’t have, either, if someone __________ you by the name.