B. 1) was
2) asked
3) had
4) didn't know
5) could
6) felt
7) started
8) have had
9) learnt
10) haven't been
C. 1. No, I don't. I've never seen it before.
2. Yes. I went there last weekend.
3. It's somewhere in my room. I haven't found it yet.
4. No, it ended two days ago.
5. No, sorry. We've just arrived.
