There are twenty trees to-------线上为什么是 be planted 不是to plant

There are twenty more trees to be planted.There are _______ There are lots of trees-----A to plant Bto be planted 理由? 有这样一句话:There are twenty more trees to be planted.那么这一句呢: There are also 20 trees to be planted什么意思 为什么是：We have planted ten tress and there are twenty more to There are twenty more trees to be watered.的同义句 There are tre 是All of ( ) are going to plant trees there A.they B.their C. 英语翻译是with many trees to be planted 还是 with many trees to pla There are many trees planted are you going to plant trees next 选哪个,请给出原因.A.Planting B.Planted C.To plant D.To be planted they are going to plant trees on 2 years,中的plant 还有为什么等于grow