Tina _____ have known the truth, or she would have told us.
C
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Inrecentyearsmuchmoreemphasishasbeenput______developingthestudentsproductiveskills.
Itisnolongeraproblem_______thepoorchildreninthisdistrictcangotoschool.
It _____ quite a few years _____ the accused was declared innocent and set free.
Modern science and technology has _____ communication between people far apart.
We hadn't met for 20 years, but I recognized her_____ I saw her.