1．I don't think the experiment is ___ failure, because it has provided us with ___valuable experience for our future tests．
A．不填; 不填 B．不填; a C．a; a D．a; 不填
2．—I am going to travel to America．Would you consider telling me about your experiences there?
—__．Let's discuss it over dinner．
A．That's all right B．Go ahead C．By all means D．It just depends
