( ) 2. door ( ) 3. twenty ( ) 4. thin ( ) ( ) floor ( ) thirty ( ) strong ( ) ( ) fan ( ) forty ( ) science ( ) ( ) computer ( ) fifty ( ) sports ( ) 1. D C A B 2. B A C D 3. D C B A 4. A B C D 听录音,用A、B、C、D给下列单词排序。 1. window board wall classroom 答案

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