根据汉语和句意提示填空。
I have many musical instruments. I can play the _______(小提琴).
I’m not sure _______(是否) he will come or not tomorrow.
Miss Wang made her classmates ___  _  (大笑) yesterday.
Don’t worry. There’s ________  _________ (不严重) with your leg.
Computers are widely used in people’s ___________  _______(日常生活) in the future.