英语适当形式填空,不知道用什么时态,Simon and Elsa arenot happy becausethey (invite)to the big party

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英语适当形式填空,不知道用什么时态,
Simon and Elsa arenot happy becausethey (invite)to the big party

are not invited
haven't been invited
现在在陈述一个事实,所以两个时态都可以,再加上前面主句是现在时.