【单选题】You need friends to _____, or we will feel _____. [ ]
【单选题】条件逆向法,就是通过对()进行逆向思维加以创新,从而想出解决问题的新办法就是条件逆向法。
【单选题】We need friends to ______, or we will feel ______.
【单选题】The way we speak to close friends is often not the same as the way we speak to strangers, for the conversation between close friends is______.