Most teenagers play games on their smart-phones(智能手机)_______fun.
—________do you improve your spoken English? —By________as much as possible.
—I’m not allowed to go out on school nights. —________.
The red bike________be Mr Hu’s.His bike is blue.
—Listen!Someone is knocking at the door.Who can it be? —It________be Tom.He said he would visit me this evening.
Look at that girl________name is Lucy.