We usually do some cleaning _____ weekends. [ ]

I don’t know how to begin a talk with Betty. She can sit all day long ______ a word. [ ]

Which team will the Chinese football team play _____? —The Korean team. [ ]

Should people stop using their cars and start using public transport?— __________. The roads are too crowded as it is.

I couldn’t believe it, but ______ in black and white, signed by the bank manager.