CPU采用查询方式输入数据时的流程如下图所示:

为使该流程图完整,图中ABCD处应分别对应于
A.YES、NO、YES、NO
B.NO、YES、NO、YES
C.YES、NO、NO、YES
D.NO、YES、YES、NO
第1题:
A: Have you typed the letter for me?
B:_____
A. Yes, I have
B. Yes, 1 do
C. Yes, I've done
第2题:
—May I ask you a question?
—_______ .
A.Yes, do it
B.Yes, please
C.Yes, all right
D.Yes, say it
第3题:
第4题:
A:Have you sent the fax to the travel agent?
B:_____
A.Yes,I have
B.Yes,I do
C.Yes. I've done
第5题:
A.Yes, I can get.
B.Yes, of course
C.Yes, I get.