从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。
1. It was _____ great honour for China to host _____ 29th Olympic Games.
A. a; the B. a; / C. /; the D. the; the
2. Is this the first time that Jack ______ this kind of food?
A. enjoys B. has enjoyed C. enjoyed D. had enjoyed
