A./；the B./；/ C.the；/ D.the；the
A.being not invited B.not being invited C.not inviting D.not to be invited
A.the Clean Air Act has not produced the desired results B.lead deposits in arctic snow are on the increase C.lead will stay in soil and snow longer than expected D.the US is the major source of lead pollution in arctic snow
A.although B.valley C.walk D.talk
A.appliance B.equipment C.utility D.facility
