1.When you have a headache , (you should take some aspirin and have a rest)
⇒What should we do when when we have a headache?
2.You should drink (1.5 liter of) water a day
⇒How much water should you drink a day?
3.Her father is going to (Japan) next month
⇒Where is her father going next month?
4.She is (a famous singer in Vietnam)
⇒Who is she?
5.Mr.Tuan plays golf (very badly)
⇒How does Mr.Tuan play golf?