these young trees should() A.be taken care B.be taken care of 选哪个,为什么?

问题描述:

these young trees should() A.be taken care B.be taken care of 选哪个,为什么?

B
take care of 固定用法‘ 照顾’ 变被动语态时不能省去介词OF
加油!不明白再问!