问题补充：
--What a beautiful school!
–Yes. Many trees in our school every year.
A. plant
B. are planted
C. were planted
D. is planted
答案：
A. plant
(答案→)B. are planted
C. were planted
D. is planted
解析：句意：好漂亮的学校啊！是的，每年我们学校都会种很多树。every year每一年，表示一般现在的情况，用一般现在时，句中用被动形式，故选B
