1. (2021九上·哈尔滨开学考) Each of us is going to work hard and have a meaningful school life in the eighth grade. Which of the following is not helpful to us?

①We shouldn't stay up too late in the evening and should keep a good state to listen to our teachers in class.

②We shouldn't take any sport until we finish our final exam.

③We should sleep as much as we can.

④We should eat more meat to keep us away from being tired.

⑤Sports and relaxation are the same important to us.