【判断题】平板卧推运用的主要功能是肩关节水平外展。()
【单选题】Which of the following best describes how the writer thinks about teens and online activities?
【单选题】----How about the two of us chatting online? ---- ____ . It’s much cheaper than talking on the phone.
【单选题】—How about the two of chatting online? — ______ . It's much cheaper than talking on the phone.