Question

people who --- to the party are very excited

a\ have invited
b\ has been invited
c\ will invite
d\ have been invited
请您说明理由好吗？

Answer 1

People who --- to the party are very excited.
答案：D
解析：who是关系代词，其后面紧跟的谓语动词要与主语People保持一致，而people为复数，所以谓语动词用复数，固选择D。
中文：那些已经被邀请去参加派对的人都很兴奋。

Answer 2

d，由于people是复数名词，所以排除b，因为是被邀请所以选d，have been