Directions: Complete the following passage by using ONE word that best fits the context.

     Deciding what present you should give someone is never easy. Many things must be considered such as

   1   the person is interested in and how old he is. We must also consider the reaction   2   the person receiving

the gift. One of the worst gift choices I ever made was for my high school English teacher, Ms Chen. Ms Chen has taught me English since Junior 1, and to show my appreciation I decided to get   3   a present. I asked my

classmates about her interests   4   I made my final decision. Then I went to the department store   5   I worked part-time and bought her   6   expensive gift box of Sichuan beef. I was certain she would like it   7   I had been told by my classmates that she loved hot food. I left the box with a card on her desk, and I was sure she would

like them.   8   was only after I heard she became sick that I learned she couldn't eat MSG!

抑制心衰时肾素血管紧张素系统的药物是

A．β-受体阻滞剂
B．米力农
C．多巴酚丁胺
D．洋地黄类
E．ACEl