2019年mpa考试英语真题——名词67

{01}- Could you tell me why I am constantly yawning this afternoon?  
-Yawning ______ an indication that your body lacks oxygen and needs a res.   
A.acts as    
B.serves as   
C.functions as  
D.plays as
解析：
本题选C。

{02}After taking the medicine, the patient got _______ and could go out to walk.    
A.protection        
B.relief          
C.safety            
D.defense
解析：
本题选B。