Tom with his friends often____to see Beijing opera ____weekends.
初一英语天空题，大家帮帮忙。
参考答案:1.goes;on
Tom with his friends 其实主语是Tom,所以应该用单数
原句可以改为Tom often goes to see Beijing opera with his friends on weekends.
至于是否用at 或 on 我觉得是on weekends吧（我们书上是这么写的） 不过也许也能用at
但你的答案里没at 那就用on