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.
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.