21.— You don’t have to play that record so loud, do you?
— I’m sorry. ______ you?
A.Does it bother B.Has it been bothering
C.Will it bother D.Had it bothered
22.— Can you ride a horse?
— No, I never had the chance ______.
A.for learning it B.for learning how
C.how to learn D.to learn how
23.We’ll be away for two weeks because we’ll have a ______.
A.two-weeks holiday B.two-weeks’ holidays
C.two-week holiday D.two-week’s holiday
24.We found ______ necessary to protect the environment to make us live better.
A.it B.this
C.that D.what