单词辨音。（从A、B、C、D四个选项中选出划线部分发音不一致的单词，共5小题，每小题1分，计5分。）
I used to . But now I get used to doing everything. I’m successful at last.
— Would you like to talk with your father or mother, Liu Mei? — We don’t have the same topic(话题).
China has the _____ population in the world.
—David has made great progress recently. —_____, and _____.
—_____ you _____ your homework yet? —Yes, I _____ it ten minutes ago.
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