the doctor is feeling the little girl's pulse .he says it ______normal

问题描述:

the doctor is feeling the little girl's pulse .he says it ______normal
A is feeling
B feels
C has felt
D is felt
答案是B'为什么'讲下'设计什么语法知识呢

B
feel 这里是系动词,不能用进行式及被动语态等
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