根据汉语提示完成句子。
【小题1】The______(问题，苦恼) is that he doesn’t have enough time to relax.
【小题2】Smoking can increase the_____  (危险) of getting a heart problem.
【小题3】I am not feeling well. I have a ____________(头痛)．
【小题4】I think you should think twice before you make ___________(决定)．
【小题5】A seat belt can help protect passengers in many car ___________(事故)．