455.Though he started late,Mr.Guo played the piano as well as,if ______,Miss Liu.

A.not better than

B.not better

C.no better than

D.no better

456.I'd like to have _____ car.The one I have got keeps breaking down.

A.a reliable

B.a more reliable

C.a most reliable

D.the most reliable

455.答案是A;

本题考查形容词，副词的比较级。由选项中better可知，Miss Liu前应有than;not better than不比…更好；而no better than…一样都不好。

456.答案是B;

由The one I have got keeps breaking down得知，想要辆更高级的车。