按要求改句子(1)I (plant a tree) with my friend.(对划线部分提问)(2)The air
按要求改句子
(1)I (plant a tree) with my friend.(对划线部分提问)
(2)The air was clean.(改为一般疑问句)
( )the air clean?
(3) There are rivers near my home.(改为一般疑问句)
(4)They are (picking up rubbish.)(对划线部分提问)
( )( )they ( )