1.He was awarded because he took an active_积极的___part in class activities.
take an active part in ...积极参加……
2.Please knock __敲___at the door before coming into the room
3.Chinese people plant thousands of trees to stop the sand moving towards _向/朝着____the rich farmland in the south
4.The temperature is falling below _在……之下____zero again,so please put on more clothes
5.The old woman is carrying a basket _篮子____of vegetabbles.