1.are you _____(comfort)in the chair?2.I look forward to_____(visit)China some day

1.are you _____(comfort)in the chair?
Answer: are you comfortable in the chair?
Comfortable 前面最好加上feeling，这样句子比较通顺一点。
2.I look forward to_____(visit)China some day
Answer: I look forward to visit China someday。
这里不用更改
更好的说法： I'm looking forward to visit China someday
或
I look forward in visiting China someday。
以上都是美国比较正式的英语，没有Chinese accent
祝你好运！

Are you comfortable in the chair?
你在凳子上舒服么
I look forward to visiting China some day
我期望去几天中国
look forward to doing 是固定短语

be+ adj. 因此comfort变成 comfortable
look forward to doing sth. 希望做某事 to在这里是介词
因此 visit 变成 visiting

comfortable 舒服的
visiting
(look forward to doing sth 期待做什么）

我是英语老师,帮帮你!
comfortable(a.舒适的）
visiting（look forward to doing...,表示期望做...）
最后祝你进步!