---Do you know the famous scientist Yuan Longping? ---Of course. His namewhenever the matt

问题补充：

---Do you know the famous scientist Yuan Longping?

---Of course. His namewhenever the matter of hybrid rice（杂交水稻）is discussed.

A. comes out

B. comes up

C. comes in

D. comes on

答案：

A. comes out

(答案→)B. comes up

C. comes in

D. comes on

解析：可联系答.案.网客服索取。