16. 1. It doesn't matter that. 2. It really means that.
3. It seems to me that. 4. It is bothering that.
5. It is beyond the truth that
17. 1. You still don't convince me 2. I'm still not convinced.
3. To convince me is really not easy 4. It still shows no convincing point.
5. Nobody is able to convince that.
18. 1. remember to see 2. remember to have seen
3. remembered to see 4. remember seeing
5. remember to be seeing
19. 1. the different extension 2. the extension of difference
3. the difference of extending 4. the extent that differs
5. the extent of difference
20. 1. That's what I mean 2. That makes sense
3. That's what I said. 4. That really counts
5. That's the fact.