从Ａ、Ｂ、Ｃ、Ｄ四个选项中，选出可以填入空白处的最佳选项.
21.---How much of his speech did you think you understand?
---_____. I wish I had worked harder.
A. Not a little B. Very few C. Nearly everything D. Almost nothing
22. I would have come to the party but I ____ that you were there.
A. wouldn’t know B. hadn’t come C. didn’t know D. haven’t known
23. It was this village _____ I was brought up.
A. where B. that C. on which D. which
