单项选择题
A．in B．on C．of D．from
Food packages, bottles and tins for drinks can cause （）...
单项选择题Food packages, bottles and tins for drinks can cause （）
A．air pllution B．both the litter problem and waste of resources C．excess consumption D．unnecessary buying
22（）A．WhoB．WhoeverC．OneD．Anyone
单项选择题22（）
A．Who B．Whoever C．One D．Anyone
The main cause of pollution is （）A．the production of ne...
单项选择题The main cause of pollution is （）
A．the production of new industrial goods B．increased amounts of natural substance C．our ever-increasing population D．the release of artificial of natural substances into the environment
