单项选择题
Conversation 2
A.By a central control system. B.By a mechanical ann. C.By several separated computers. D.By a few people.
A．The woman has bread and butter. B．The woman has some butter, but not any bread. C．The woman has some bread, but not any butter. D．The woman hasn’t bread or butter.
A.Six. B.Two. C.Three. D.Four.