【英语选择题】who is she __?her sister.[looking/finding/waiting/wai

【英语选择题】who is she __?her sister.[looking/finding/waiting/waiting for]
who is she __?her sister.[looking/finding/waiting/waiting for]
how often do you exercise?-____.[for two hours/by bus/never/more than half an hour]
___ tv do you watch every night?--more than three hours.[how long/how much/how many/how often]
what is your brother like?-he ___.[is good at dancing/likes swimming/is a swimmer/is helpful and polite]