几道语法题
1.Thechiefreasonforthepopulationgrowthisn'tsomuchariseinbirthrates——afallindeathratesasaresultofimprovementsinmedicalcare.
答案是as是因为notso...as
2.WhenEdisondied,itwasproposedthattheAmericanpeopleturnedoffallpowerintheirhouses…Becauseoftherecentaccidents,ourparentsforbidmybrotherandmefromswimmingintheriver.
3.Englishisoneofthepooresttaughtsubjectsinhighschoolsatpresent.
以上两题划横线的错误应如何改正
第二题下划线是turnedoff
第一题那一条横线是填as的意思