We noticed that each animal and each tree in the park being taken good care of.A. areB. i

问题补充：

We noticed that each animal and each tree in the park being taken good care of.

A. are

B. is

C. were

D. was

答案：

A. are

B. is

C. were

(答案→)D. was

解析：考查时态及主谓一致。句意：我们注意到这个公园的每一只动物和每一棵树都得到了很好的照顾。结合语境可知下文描述的是过去的状态，故用一般过去时态。本句强调的是每一个，故用谓语动词用单数，选D。