问题描述：
1Mary likes to play____ violin,but her brother likes to play ____football.
2 Study hard____you're sure to have a good resuid in the exam.
3 It took us three days______the work.
谁知道这到题怎么做的?
2 Study hard____you're sure to have a good resuid in the exam.
3 It took us three days______the work.
谁知道这到题怎么做的?
问题解答：
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