具有传播需求的个人或集团，称之为（）.
A.信息
B.信息源
C.信道
D.信宿
参考答案：B
I got many presents that day and so you can’t _______ how surprised I was.[ ]
A. know
B. decide
C. find
D. imagine
Please add the mustard the beef.[ ]
A. at
B. in
C. to
D. with
