从A、B、C、D四个选项中选出最佳选项，并在答题卷上相应番号处将该项涂黑。
1. Passed from father to son, the music has n ot changed for eight centuries，and among the richer Naxi people, ________ knowledge of this music showed that you were ________real gentleman.
A. a; a B. the, 不填 C.不填;a D. the; the
2. —I am thinking of the test tomorrow. I am afraid I cannot pass this time.
—_________! I am sure you will make it.
A. Go ahead B. Good luck C. No problem D. Cheer up
3. Seriously damaged, the bike is no longer .
