根据句意和汉语注释,写出单词的正确形式。
小题1:Heart trouble is one of the most serious causes of _________(死)among old people.
小题2:Hundreds of students pushed to get into a room _________(拥挤的)with photographers and TV cameramen.
小题3:The exercise was too difficult. It was _________(超过)the abilities of most of the class.
小题4:The earth is only a baby _________(比较)with many other celestial bodies(天体).