Our company has arranged me to go on a business trip to Shenzhen next week,but I will drop in on my friend in Guangzhou first.In other words,I will go to Shenzhen ________ Guangzhou.
Half the world's population __________ water shortages within 15 years according to the World Bank, just one of many recent alarming reports on the world's fresh water supply.
It is reported that in our country cities __________ heavy air pollution that is 30 percent above the national standard or higher should try to meet standards by 2030.