She set off at 9 a.mand ____ the airport an hour later

He has been told many times that his casualclothes are not ____ for some formal occasions．

It usually takes him 10 minutes ________ to school.

(2013·高考安徽卷)David is ________ animal fur，so he won’t visit anyone who has cats or dogs in the house.

_______ does your father go to work every day— He takes the subway.