从高考题谈“until”一词的用法

Until一词在以往高考题中的复现率很高。仅NMET95高考题就有两道题涉及到until一词。请看: 1.(NMET95—33)It waa not until1920____regUlar radio broadcasts began. A.while B.which C.that D.since 2.(NMET95—38)NOt until all the fosh died in the river how setiotis the pollution Was.。