—It's so late. Why not write the report tomorrow? —But I don't know _______. I can do it if not now.
---I’m sorry to keep you waiting.--- It doesn’t matter. I ____ here for only a few minutes.
I find ____ difficult to study English well, though I am still young.
When we meet our friends, we get ________about something and end up______ in Chinese.
The poor dog was________ when we found it. The bad weather killed it.
________ old man in the white hat has _______ 18-year-old daughter.