451.Did you enjoy yourself at the party?
Yes,I've never been to ___ one before.
A.a more excited
B.the most excited
C.a more exciting
D.the most exciting
452.Why didn't you buy the camera you had longed for?
I had planned to,but I was 50 ___.
A.fewer
B.less
C.cheap
D.short
451.答案是C;
考查比较级用于否定句中表示最高级的含义。此外修饰party用exciting。
452.答案是D;
句意:我还缺50。short 不足的,缺少的。后置修饰。be short of sth.缺少某物。
453．After two year's research,we now have a _____ better understanding of the diease.
A.very
B.far
C.fairly
D.quite
454.Alan is a careful driver,but he drives _____ of my friends.
A.more carefully
B.the most carefully
C.less carefully
D.the least carefully
453.答案是B;
far,rather,much,any,no等修饰比较级。
454.答案是D;
由of my friends得知应用最高级，而but表示转折。
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。
457.Overpopulation is a terrible threat to the human race.Yet it is probably ______ a threat to the human race than environment destruction.
A.no more
B.not more
C.even more
D.little more
458.With the speed-up of the railway,now you can get to your destination ______ by train.
A.fast
B.faster
C.fastest
D.the fastest
457.答案是B;
考查no+比较级+than和not+比较级+than的区别。no+比较级+than和…一样不…；not+比较级+than 不比…更…。此题由yet得知，人口过剩问题并不比环境破坏对人类威胁更大。
458.答案是B;
由with the speed-up of the railway暗示，应用比较级。
459.Girls used to take fewer adavanced math courses than boys but now they are taking just _______.
A.as much
B.too much
C.as many
D.too many
460.During you stay in Britain,you'll face culture shock ____ language problems.
A.as far as
B.as long as
C.as good as
D.as well as
459.答案是C;
根据句意得知:如今女孩和男孩选修一样的高等数学课程。此题省略了advanced math courses as boys。
460.答案是D;
as far as远到…，据…；as long as只要；as good as 和…一样好；as well as 不但…而且…。注意:A as well as B,不但B而且A。