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【单选题】The results of the survey are _______ and useful despite being from a small sample.
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【单选题】The director said that they needed a young actress who could _______ someone who was both unbalanced and confident at the same time.
【单选题】Praise must be used wisely to _______ students who perform up to expectations and to encourage students to perform to maximum levels.
【单选题】In the _______ of research, it is an accepted fact that scientific publications have to be written or translated into English to get published,acknowledged,and cited.
【单选题】He received a(n) _______ call threatening to disclose details of his affair if he didn’t pay the money.
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