2.This is a very strong lion.(用how改为感叹句) ___________________

var str=this is a javascript book!; index=str.lastIndexOf(i,3); alert(index); 为什么输出2啊?var str=this is a javascript book!;index=str.lastIndexOf(i,5);alert(index);str.lastIndexof(字符,数字),数字是从哪开始数?怎么数? This is a very p_____ trip. This is a very busy semester. this -----is very interesting. This is a ( ) boy.A a very good B a good very C very a good D very good a the a() of this book is a very young girl 2.This is a very strong lion.(用how改为感叹句) ___________________ This is a very interesting story.(同义句转换) this is a very beautiful dress 改成感叹句 This is a very interesting zoo.改为感叹句 This is a very _(success) action movie This is a very strange thing which happened only yesterday this problem is very easy A----- can do it This is a very exciting plan.（改为感叹句） This is a very intersting movie(改为感叹句） This old dish is in a very fragile condition.mean? This kite is very nice.Do you ()a go?填空! This is a very interesting film.(改为感叹句)______ ______ interesting film this is!