用适当的词填空，使句子完整通顺，并与原句意思相符。每空只填一个词，缩写词算一个词。
79. Alice has seen the film twice. Sandy has seen it twice, too.
Alice Sandy have seen the film twice.
80. 1 think music is less interesting than P. E.
I think music is interesting than P. E.
81. Is there a flight from Yinchuan to Guilin this Saturday? Do you know?
Do you know a flight from Yinchuan to Guilin this Saturday?
，我们将会及时处理。
