高一英语..一课一练求解释.急~!Isawthreetoughguys_____(tease)and_____(bullyayoungboy,whiletravelinghomebysubway.答案是两个都加ing谁能告诉我为什么..Whodoyouthink_____(blame)forthiss

　　高一英语..一课一练求解释.急~!

　　Isawthreetoughguys_____(tease)and_____(bullyayoungboy,whiletravelinghomebysubway.答案是两个都加ing谁能告诉我为什么..

　　Whodoyouthink_____(blame)forthissituation,thecheckoutassistantorthewriter?答案上是istoblame能不能写willblame呢?解释一下

　　Johnseemed_____(work)hardathisgraduationpaperatthattime.答案是tobeworking而我写的是towork...能帮忙解释一下么...

　　很急!如果有回答满意的快的话加分昂...