The roof of our house is broken, so it needs _______.A.repairedB.repairingC.being repai

One of the benefits of green roofs is the reduction of the heat island effect in cities.A．

One focus in the green roof research is the evaluation of suitable plant species.A．RightB．

The pillars ____ the roof of the house.A.preserveB.reserveC.retainD.sustain

Our house is about a mile from the railway station and there are not many houses （).

Our new house is on the 【first】 floor.A. bottomB.

Our new house is on the 【first】 floor.A. bottomB.