单选题 Plastic sheeting should be wrapped around the tree in winner to ______ it from the wind and the frost.
【正确答案】 B
【答案解析】[解析] 固定搭配。shield与from为固定搭配,意为“庇护,使免遭……”,此处的意思是“免遭风和霜冻”。故答案为B。