A.reserve B.decorate C.store D.keep
A.are puzzled by the mystery of forest pollution B.feel relieved by the use of unleaded gasoline C.still consider lead pollution a problem D.lack sufficient means to combat lead pollution
A.cause B.make C.leave D.prove
A.block B.sofa C.glory D.idiom
A. B. C. D.
A.reason B.switch C.spirit D.seldom
