The air in mountain areas is ____ that in big cities.
Do you dress differently because of what you see in advertisements or buy things you might not ________buy?
Perhaps Taobao is Asia’s largest and most popular retail(零售的)network platform , _____ people can buy and sell a great variety of things .
The two friends had a quarrel about money, but shortly afterwards they shook hands and ________.
In the 21st century, all nations must take their ________of responsibility for the global safety.
-----How good the news is for you! ------ ______________.