课时 1 听力练习
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Watch the following video clip about Social Security twice and finish the 20 blanks with the words you hear.
★请在下面的章节测验里填写20个空的答案:
目录
Watch the following video clip about Social Security twice and finish the 20 blanks with the words you hear.
★请在下面的章节测验里填写20个空的答案: