Their favorite sport [ ] tennis 是are 还是is
问题描述：
Their favorite sport [ ] tennis 是are 还是is
john likes hamburgers 【 】 jack likes ice cream
but 还是and
答
Their favorite sport is teninis.
因为就一种是网球,所以用单数.
John likes hamburgers but jack likes ice cream.
其实两种都可以.
但一般用but 表示意思有转折.