单项选择题
A. how to adapt to the environment B. how to defeat something dangerous C. how to forecast weather D. how to control moving objects
A. to help her father with business B. to help Steven choose a bike C. to buy herself a bike D. to work part time as a salesclerk
A．invite him to join in the theatre group B．invite him to watch their rehearsal C．ask for his help D．ask for his opinion about their theatre group