Ⅰ.语境填词
1．This is beyond my narrow ________(范围) of knowledge.
2．Most people have come to accept the need for ______(保护) of natural resources.
3．In London，car ________(发动机) produce 99% of all carbon monoxide in the atmosphere.
4．It’s OK to leave an ________(电的) appliance on so long as you are using it—if not，turn it off!
5．It is ________(违法的) to drive after drinking.
