详细说明为什么.More trees ______ on the hill .A,must be planted B,b

详细说明为什么.More trees ______ on the hill .A,must be planted B,b ______young trees must be planted on the hill （ ）Twenty more trees will be planted on the mountain. the pande wanted to see who planted ( )trees.A,the more B,th We planted many trees on the hill变成被动语态 More trees must be planted every year.(改为一般疑问句) they planted trees on ___ side of the playground .A.each B.e There are （ ） trees on the hill.A.thousands of B.two thousan We can see( )trees on the hill.A` thousand B`thousand of C`t More trees——around our city every spring.A.plant B.planted C They planted trees on each ______ (side) of the road. the boys planted some trees on the hill yesterday.改为同义句 some