Jack is really and than I am.A. funny quietB. funny more quietC. funnier quieterD. funn

问题补充：

Jack is really and than I am.

A. funny, quiet

B. funny, more quiet

C. funnier, quieter

D. funny, quieter

答案：

A. funny, quiet

B. funny, more quiet

C. funnier, quieter

(答案→)D. funny, quieter

解析：根据really可知，其后应该用形容词原级，所以第一个空，应填funny；又因为than，可知应该用比较级。所以本题选D。