【单选题】It is good news that Jack ________ by a famous university.
【判断题】边际报酬递减的原因是增加可变生产要素只能与越来越少的固定生产要素相结合。
【单选题】—Where’s Jack? —He’s left a ________ saying that he will be back in a minute.
【单选题】________ news Jack told us just now!
【单选题】(1) What is the news about Jack?
A.
He was away on vacation.
B.
He got a new job recently.
【单选题】You can only tell the news to Tom,Jack and Bill,and __________ it should be kept.