中国大学MOOC: The United States is a land where not _____ independent by a certain age is a source of shame.
举一反三
- The United States is a land where not _____ independent by a certain age is a source of shame. A: being B: be C: is D: are
- The United States is a land where not ___ independent by a certain age is a source of shame. A: eing B: e C: is D: are
- In<br/>______ ,<br/>the United States declared its independent
- Canada's border with the United States is the world's longest land border, sharing land borders with the contiguous United States to the south, and the US state of Alaska to the northwest.
- 中国大学MOOC: There are ________________ (a number）states in the United States.