Unit 7 Will people have robots?单元练习 一、单项选择(共15小题;共15分) 1.Put your hands behind your back. Dont speak. Well in ten minutes.A. backB. be backC. are backD. are back to you 2.- When can I go to play basketball with my friends, Daddy?- Finish your homework first, or I let you go.A. dontB. haventC. didntD. wont 3.