Упр.3a Уроки 3-4 Юнит 9 New Millennium English 11 класс

3 A. Look at the underlined sentences in the text (Ex. 2B) and answer questions 1–4 alongside the text.

1. We don’t know.
2. It is not known for sure.
3. We don’t know.
4. Because it is not known for sure.