50. The grandson makes a lot of noise as (   ) .

• A、he never cares whether the neighbors might want to live in peace and quiet

• B、 the walls of the building are thin

• C、he likes to listen to his radio early in the morning

• D、friends come to visit him

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

54 (   )