Leader of most countries in the world attended the UN meeting __________ in South Africa earlier this year.
问题描述：
Leader of most countries in the world attended the UN meeting __________ in South Africa earlier this year.
Held
To be held
会议一般不是to be held吗?为什么这里用不行?不是会议在前吗?
The chair looks rather hard ,but it is very comfortable to ________ .
Sit
Sit on
我一直搞不懂什么时候后面要跟介词.求详解
答
Leader of most countries in the world attended the UN meeting 【（which was）held in South Africa earlier this year.】
【】是定语从句,修饰 the UN meeting,省略（which was）.To be held是将来时,前面用了attended了,是过去,所以不能用.
Sit on+ sth. 如果是sit,就是chair主动去坐.坐着舒服的是人,不是椅子.