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8. —The sky is quite blue. 

—Yes, I've never seen (   ) before. 

• A、such blue sky

• B、such a blue sky

• C、so blue sky

• D、that blue sky

47. Karen lived for (   ) since she had got out of the hospital. 

• A、eleven months

• B、nine months

• C、twenty months

• D、twelve months

53 (   ),