My sister enjoys ______ junk food (垃圾食品).

People try to avoid public transportation delays by using their own cars, and this ________creates further problems.(2007· 湖北)

_____was expected, he broke his promise once more, ______left his friends down.

The square was so named ______ a famous black leader in history.

What are you going to do this weekend—________.If time permits，I may go to Shanghai with my friends.