I don't think it's because they don't know how.
举一反三
- I don't think you two know each other,______? A: do I B: don't I C: do you D: don't you
- The freshman year is the most difficult for all college students because ______. A: they don't know how to live on their own B: they don't know when to study at college level C: they don't know how to study at the college level D: they don't have enough time for study
- They don’t do those things because they don’t know ______. A: what B: how C: why D: when
- 中国大学MOOC: I don’t know how to use the CAD software, and what’s more, I don’t believe you do either!
- I don’t use Kurt’s car because I don’t quite appreciate _______ .