the trees and plants can help ___ the air fresher and cleaner. A：making B：to make C:made选哪个?help后面不是跟原型吗?求解释

they hold plants and trees above the graund. seeds/to grow up to be plants and trees roots/ to hold plants and trees in the groundtrunks/to hold the trees above the ground的意思 trees and plants稍微多一点的 Do the trees and plants make the air clean怎样回答 teacher plants the trees and we gets the shade中文意思是?及文法ok Trees and plants can keep the water from flowing away这句话到底怎么翻译合适, The country has many b____ national parks with wonderful plants and trees. The family plants t_________of trees every year. we must plant more plants and trees .the birds and animals can live in them 合并为一句 we must plant more plants and trees .the birds and animals can live in them 合并为一句we must plant more plants and trees ____the birds and animals ____live in. There are two kinds of plants:flowering plants and non-flowering plants.Almost a___ the trees around us are flowering plants.you can know some trees f___ their flowers and fruits.Non-flowering plants don't grow flowers.You can't see non-flowering pla The students are busy ___ trees and flowers.A.to plant B.plant C.plants D.planting 英语翻译翻译 we will be able to make plants and animals we will also be able to change dogs into trees in the future please come and water the plants. the pumpkin plants need water and sunlight. we will be able to make plants and animals we will also be able to change dogs into trees in the...we will be able to make plants and animals we will also be able to change dogs into trees in the future 翻译 there are lots of tall trees and other different kinds of plants是什么意 用rain,and,trees,plants,can,grow,make组一句话,快!