21. Thenewcomersfounditimpossibleto________themselvestotheclimatesufficientlytomakepermanenthomesinthenewcountry.（5.0分）
21. Thenewcomersfounditimpossibleto________themselvestotheclimatesufficientlytomakepermanenthomesinthenewcountry.（5.0分）
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