—This returned Chinese scholar has become one of the top experts in this field .—Yes , I know him very well . He in Africa with wild animals for eight years .
Hearing the __________news that he failed the exam, a ___________look appeared on his face.
With more people _____the traffic rules, our city is becoming better organized.
_____it is to have _____exciting football game in the afternoon after school!
Rather than _____his car on the busy road, Mr Green always prefers____ his bike.
Alice likes listening to____ music while Joan is fond of surfing on ____Internet.