题目内容
They kept on trying their best to develop their business, but in such _____ market competition, they had no idea if success would come along one day.
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As music plays an important role in our life, many music teachers and educators _____ taking up a musical instrument at a young age.
This rule should be entirely clear in the minds of everyone and should not be misunderstood under any _____ .
My daughter was shy; she was afraid to ask questions, _____ to questions in class, or talk with other children.
I got from him only a letter, which was put on my office desk; _____ to the receipt of this letter I have never heard from him.
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