1．(2019年北京卷·七选五型阅读理解)An Ateam may require a ________ (balance)—not just A players, but a few generous B players as well.
2．(2018年新课标Ⅰ卷·语法填空)To avoid knee pain, you can run on soft surfaces, do exercises to ________ (strength) your leg muscles (肌肉), avoid hills and get good running shoes.
3．(2019年天津卷·阅读理解B)And I've found that the possibilities that lie within books are ________ (limited).
