2019年mpa考试英语真题——介词和介词短语9

{01}Make sure you ________ the computer before you leave the house．
A.restart
B.lock up
C.close
D.shut down
解析：
本题选D。
{02}The defense lawyer was questioning the old man who was one of the ________ of the murder committed last month．
A.observers
B.viewers
C.witnesses
D.audiences
解析：
本题选C。