问题
选择题
Many flowers ________ in our school last year，and they made our school a beautiful garden．
A．plant
B．planted
C．have planted
D．were planted
答案
答案：D
题目分析：句意：我们学校去年种了很多花，它们使学校变成了美丽的花园。主语是flowers花，与动词plant种植是被动关系，所以用被动语态，结构为:be+动词过去分词；从last year得知是过去的事情，所以用were planted,故选D。