第二节 语法和词汇知识(共15小题，每小题1分，满分1 5分)
从A、B、C、D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将 该项涂黑。
6． Obama was elected _____ president last year, who is _____ first black president of ______ U. S. A.
A. /; a; the B. /; the; the C. the; a; / D. the; the; /
7． I would appreciate ______, to be frank, if goods could be delivered as soon as possible.
A. you B. this C. myself D. it
