一百年以后会发生什么?
① will happen ② 100 years?
你多久锻炼一次。
① ② do you. exercise?
.有些著名设想没有实现。
Some famous predictions didn’t ① ② .
你介意把音乐调低一些吗?
Would you mind ① ② the music?
你以前个子不高,是不是?
You used to be short, ① ② ?