change 是可数,例句如下：
You need a rest and change.
你需要休息和换个环境.
· go to the country for a change of air
到乡下去换空气
· He needs a change of air.
他需要易地疗养.
· Great changes have taken place since 1979.
一九七九年以来发生了巨大的变化.
report要视具体意思而言
[C]：可数,[U]：不可数,具体如下
1.报告;报告书[C]
2.报导;通讯[C]
3.传闻[C][U]
I never believe idle reports.
我从来不信捕风捉影的传闻.
4.【英】成绩单[C]
My son got an excellent report last semester.
我儿子上学期成绩出色.
5.爆炸声,枪声[C]
Rifle reports could be heard in the distance.
听得见远处传来的步枪声.
6.风评,名声[U]