Would you mind if I named my dog after your son—________！My wife and Iwill both be proud of it

I heard a student killed his mother cruelly– So did I It has ____a serious problemabout the education system in China

You look unhappy， my son?—I’m wondering how long it’ll be we come to China again

When asked about their opinion about the president, many citizens would prefer to see him step aside ___________ younger men.[ ]

There is “u” and “s” in the word “useful”.