A. earn B. go to bed C. Roman D. mobile phone A. run B. joke C. monotonous D. tiring A. discussion B. brigade C. itself D. below A. retirement B. plausible C. singer D. in public A. sometimes B. hungry C. instead of D. finely A. a glass of B. fix up C. obey D. No littering A. insert B. flood C. exercise D. purpose A. mathematics B. till C. aesthetic D. thirteen A. study B. wonderful C. recreation D. bump A. image B. delicate C. humanity D. turn