How can the water become vapour?去掉the,
How can water become vapour?水如何才能变成蒸汽?
因为water是不可数名词,且在此表示泛指,因此不能加the.
What does she like do?改成 What does she like to do?她想干什么?
或:What does she like doing 她喜欢干什么?
还可去掉 like :What does she do?她是干什么的?
like doing sth.喜欢做某事,like to do sth.想做某事