精剖析重点词汇,学业分层测评,巧突破核心句型,with,under attack,on/upon,a heart attack,existence,exist in,exist on,exists,existing,existence,to provide,to have discovered,is claimed,for,keep calm,calm down,to make,to suffer,It is likely that,with,covered,covers an area of,moving quickly,through the water,He claims to have seen a,to be eating,to turn,to have been translated,There have been,There is,There is going to/will be,Have there been,There had been,