题干
The naughty boy is always in his room．His mother is very angry．
A：tidy up
B：cleaning up
C：make a mess
D：making a mess
答案(点此获取答案解析）
D
The naughty boy is always in his room．His mother is very angry．
A：tidy up
B：cleaning up
C：make a mess
D：making a mess
，
，“
”是“
”的（ ）
