1.My younger brother, a naughty boy, doesn't like telling what to do and where to go 2 .preserving natural resources mean keeping them for the future generations 3. he must have asleep because there was no light in his room when I came
1.telling--->to tell 2.mean keeping -->means keeping 3.must have asleep ---> must be asleep. Vì asleep là một tính từ.
1.My younger brother, a naughty boy, doesn't like telling what to do and where to go => being told 2 .preserving natural resources mean keeping them for the future generations => means 3. he must have asleep because there was no light in his room when I came => must have slept